CVE-2021-47238 (GCVE-0-2021-47238)
Vulnerability from cvelistv5
Published
2024-05-21 14:19
Modified
2025-05-07 19:58
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: ipv4: fix memory leak in ip_mc_add1_src BUG: memory leak unreferenced object 0xffff888101bc4c00 (size 32): comm "syz-executor527", pid 360, jiffies 4294807421 (age 19.329s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 01 00 00 00 00 00 00 00 ac 14 14 bb 00 00 02 00 ................ backtrace: [<00000000f17c5244>] kmalloc include/linux/slab.h:558 [inline] [<00000000f17c5244>] kzalloc include/linux/slab.h:688 [inline] [<00000000f17c5244>] ip_mc_add1_src net/ipv4/igmp.c:1971 [inline] [<00000000f17c5244>] ip_mc_add_src+0x95f/0xdb0 net/ipv4/igmp.c:2095 [<000000001cb99709>] ip_mc_source+0x84c/0xea0 net/ipv4/igmp.c:2416 [<0000000052cf19ed>] do_ip_setsockopt net/ipv4/ip_sockglue.c:1294 [inline] [<0000000052cf19ed>] ip_setsockopt+0x114b/0x30c0 net/ipv4/ip_sockglue.c:1423 [<00000000477edfbc>] raw_setsockopt+0x13d/0x170 net/ipv4/raw.c:857 [<00000000e75ca9bb>] __sys_setsockopt+0x158/0x270 net/socket.c:2117 [<00000000bdb993a8>] __do_sys_setsockopt net/socket.c:2128 [inline] [<00000000bdb993a8>] __se_sys_setsockopt net/socket.c:2125 [inline] [<00000000bdb993a8>] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2125 [<000000006a1ffdbd>] do_syscall_64+0x40/0x80 arch/x86/entry/common.c:47 [<00000000b11467c4>] entry_SYSCALL_64_after_hwframe+0x44/0xae In commit 24803f38a5c0 ("igmp: do not remove igmp souce list info when set link down"), the ip_mc_clear_src() in ip_mc_destroy_dev() was removed, because it was also called in igmpv3_clear_delrec(). Rough callgraph: inetdev_destroy -> ip_mc_destroy_dev -> igmpv3_clear_delrec -> ip_mc_clear_src -> RCU_INIT_POINTER(dev->ip_ptr, NULL) However, ip_mc_clear_src() called in igmpv3_clear_delrec() doesn't release in_dev->mc_list->sources. And RCU_INIT_POINTER() assigns the NULL to dev->ip_ptr. As a result, in_dev cannot be obtained through inetdev_by_index() and then in_dev->mc_list->sources cannot be released by ip_mc_del1_src() in the sock_close. Rough call sequence goes like: sock_close -> __sock_release -> inet_release -> ip_mc_drop_socket -> inetdev_by_index -> ip_mc_leave_src -> ip_mc_del_src -> ip_mc_del1_src So we still need to call ip_mc_clear_src() in ip_mc_destroy_dev() to free in_dev->mc_list->sources.
References
Impacted products
Vendor Product Version
Linux Linux Version: 24803f38a5c0b6c57ed800b47e695f9ce474bc3a
Version: 24803f38a5c0b6c57ed800b47e695f9ce474bc3a
Version: 24803f38a5c0b6c57ed800b47e695f9ce474bc3a
Version: 24803f38a5c0b6c57ed800b47e695f9ce474bc3a
Version: 24803f38a5c0b6c57ed800b47e695f9ce474bc3a
Version: 24803f38a5c0b6c57ed800b47e695f9ce474bc3a
Version: 24803f38a5c0b6c57ed800b47e695f9ce474bc3a
Version: bd1b664a19403ede448d29c87b2f23796bc7a577
Version: b38c6e0bd5b5e439ecebdc0df599d573c2f610f8
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThan": "0dc13e75507f",
                "status": "affected",
                "version": "24803f38a5c0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThan": "6cff57eea334",
                "status": "affected",
                "version": "24803f38a5c0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThan": "1e28018b5c83",
                "status": "affected",
                "version": "24803f38a5c0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThan": "3dd2aeac2e96",
                "status": "affected",
                "version": "24803f38a5c0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThan": "ac31cc837caf",
                "status": "affected",
                "version": "24803f38a5c0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThan": "77de6ee73f54",
                "status": "affected",
                "version": "24803f38a5c0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThan": "d8e2973029b8",
                "status": "affected",
                "version": "24803f38a5c0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "status": "affected",
                "version": "4.9"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThan": "4.9",
                "status": "unaffected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThanOrEqual": "5.0",
                "status": "unaffected",
                "version": "4.9.274",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThanOrEqual": "4.15",
                "status": "unaffected",
                "version": "4.14.238",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThanOrEqual": "4.20",
                "status": "unaffected",
                "version": "4.19.196",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThanOrEqual": "5.5",
                "status": "unaffected",
                "version": "5.4.128",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThanOrEqual": "5.11",
                "status": "unaffected",
                "version": "5.10.46",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThanOrEqual": "5.13",
                "status": "unaffected",
                "version": "5.12.13",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "status": "unaffected",
                "version": "5.13"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-47238",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-07T19:57:25.364822Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-400",
                "description": "CWE-400 Uncontrolled Resource Consumption",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-07T19:58:16.834Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:32:07.941Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0dc13e75507faa17ac9f7562b4ef7bf8fcd78422"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/6cff57eea3347f79f1867cc53e1093b6614138d8"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/1e28018b5c83d5073f74a6fb72eabe8370b2f501"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/3dd2aeac2e9624cff9fa634710837e4f2e352758"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ac31cc837cafb57a271babad8ccffbf733caa076"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/77de6ee73f54a9a89c0afa0bf4c53b239aa9953a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/d8e2973029b8b2ce477b564824431f3385c77083"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/igmp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0dc13e75507faa17ac9f7562b4ef7bf8fcd78422",
              "status": "affected",
              "version": "24803f38a5c0b6c57ed800b47e695f9ce474bc3a",
              "versionType": "git"
            },
            {
              "lessThan": "6cff57eea3347f79f1867cc53e1093b6614138d8",
              "status": "affected",
              "version": "24803f38a5c0b6c57ed800b47e695f9ce474bc3a",
              "versionType": "git"
            },
            {
              "lessThan": "1e28018b5c83d5073f74a6fb72eabe8370b2f501",
              "status": "affected",
              "version": "24803f38a5c0b6c57ed800b47e695f9ce474bc3a",
              "versionType": "git"
            },
            {
              "lessThan": "3dd2aeac2e9624cff9fa634710837e4f2e352758",
              "status": "affected",
              "version": "24803f38a5c0b6c57ed800b47e695f9ce474bc3a",
              "versionType": "git"
            },
            {
              "lessThan": "ac31cc837cafb57a271babad8ccffbf733caa076",
              "status": "affected",
              "version": "24803f38a5c0b6c57ed800b47e695f9ce474bc3a",
              "versionType": "git"
            },
            {
              "lessThan": "77de6ee73f54a9a89c0afa0bf4c53b239aa9953a",
              "status": "affected",
              "version": "24803f38a5c0b6c57ed800b47e695f9ce474bc3a",
              "versionType": "git"
            },
            {
              "lessThan": "d8e2973029b8b2ce477b564824431f3385c77083",
              "status": "affected",
              "version": "24803f38a5c0b6c57ed800b47e695f9ce474bc3a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bd1b664a19403ede448d29c87b2f23796bc7a577",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b38c6e0bd5b5e439ecebdc0df599d573c2f610f8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/igmp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
              "lessThan": "4.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.274",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.238",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.196",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.274",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.238",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.196",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.128",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.46",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.12.13",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.2.87",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.16.42",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv4: fix memory leak in ip_mc_add1_src\n\nBUG: memory leak\nunreferenced object 0xffff888101bc4c00 (size 32):\n  comm \"syz-executor527\", pid 360, jiffies 4294807421 (age 19.329s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n    01 00 00 00 00 00 00 00 ac 14 14 bb 00 00 02 00 ................\n  backtrace:\n    [\u003c00000000f17c5244\u003e] kmalloc include/linux/slab.h:558 [inline]\n    [\u003c00000000f17c5244\u003e] kzalloc include/linux/slab.h:688 [inline]\n    [\u003c00000000f17c5244\u003e] ip_mc_add1_src net/ipv4/igmp.c:1971 [inline]\n    [\u003c00000000f17c5244\u003e] ip_mc_add_src+0x95f/0xdb0 net/ipv4/igmp.c:2095\n    [\u003c000000001cb99709\u003e] ip_mc_source+0x84c/0xea0 net/ipv4/igmp.c:2416\n    [\u003c0000000052cf19ed\u003e] do_ip_setsockopt net/ipv4/ip_sockglue.c:1294 [inline]\n    [\u003c0000000052cf19ed\u003e] ip_setsockopt+0x114b/0x30c0 net/ipv4/ip_sockglue.c:1423\n    [\u003c00000000477edfbc\u003e] raw_setsockopt+0x13d/0x170 net/ipv4/raw.c:857\n    [\u003c00000000e75ca9bb\u003e] __sys_setsockopt+0x158/0x270 net/socket.c:2117\n    [\u003c00000000bdb993a8\u003e] __do_sys_setsockopt net/socket.c:2128 [inline]\n    [\u003c00000000bdb993a8\u003e] __se_sys_setsockopt net/socket.c:2125 [inline]\n    [\u003c00000000bdb993a8\u003e] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2125\n    [\u003c000000006a1ffdbd\u003e] do_syscall_64+0x40/0x80 arch/x86/entry/common.c:47\n    [\u003c00000000b11467c4\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nIn commit 24803f38a5c0 (\"igmp: do not remove igmp souce list info when set\nlink down\"), the ip_mc_clear_src() in ip_mc_destroy_dev() was removed,\nbecause it was also called in igmpv3_clear_delrec().\n\nRough callgraph:\n\ninetdev_destroy\n-\u003e ip_mc_destroy_dev\n     -\u003e igmpv3_clear_delrec\n        -\u003e ip_mc_clear_src\n-\u003e RCU_INIT_POINTER(dev-\u003eip_ptr, NULL)\n\nHowever, ip_mc_clear_src() called in igmpv3_clear_delrec() doesn\u0027t\nrelease in_dev-\u003emc_list-\u003esources. And RCU_INIT_POINTER() assigns the\nNULL to dev-\u003eip_ptr. As a result, in_dev cannot be obtained through\ninetdev_by_index() and then in_dev-\u003emc_list-\u003esources cannot be released\nby ip_mc_del1_src() in the sock_close. Rough call sequence goes like:\n\nsock_close\n-\u003e __sock_release\n   -\u003e inet_release\n      -\u003e ip_mc_drop_socket\n         -\u003e inetdev_by_index\n         -\u003e ip_mc_leave_src\n            -\u003e ip_mc_del_src\n               -\u003e ip_mc_del1_src\n\nSo we still need to call ip_mc_clear_src() in ip_mc_destroy_dev() to free\nin_dev-\u003emc_list-\u003esources."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T12:41:17.545Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0dc13e75507faa17ac9f7562b4ef7bf8fcd78422"
        },
        {
          "url": "https://git.kernel.org/stable/c/6cff57eea3347f79f1867cc53e1093b6614138d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/1e28018b5c83d5073f74a6fb72eabe8370b2f501"
        },
        {
          "url": "https://git.kernel.org/stable/c/3dd2aeac2e9624cff9fa634710837e4f2e352758"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac31cc837cafb57a271babad8ccffbf733caa076"
        },
        {
          "url": "https://git.kernel.org/stable/c/77de6ee73f54a9a89c0afa0bf4c53b239aa9953a"
        },
        {
          "url": "https://git.kernel.org/stable/c/d8e2973029b8b2ce477b564824431f3385c77083"
        }
      ],
      "title": "net: ipv4: fix memory leak in ip_mc_add1_src",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47238",
    "datePublished": "2024-05-21T14:19:39.041Z",
    "dateReserved": "2024-04-10T18:59:19.532Z",
    "dateUpdated": "2025-05-07T19:58:16.834Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0dc13e75507faa17ac9f7562b4ef7bf8fcd78422\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/6cff57eea3347f79f1867cc53e1093b6614138d8\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/1e28018b5c83d5073f74a6fb72eabe8370b2f501\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3dd2aeac2e9624cff9fa634710837e4f2e352758\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ac31cc837cafb57a271babad8ccffbf733caa076\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/77de6ee73f54a9a89c0afa0bf4c53b239aa9953a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d8e2973029b8b2ce477b564824431f3385c77083\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.941Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47238\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-12T18:42:08.780386Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"24803f38a5c0\", \"lessThan\": \"0dc13e75507f\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"24803f38a5c0\", \"lessThan\": \"6cff57eea334\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"24803f38a5c0\", \"lessThan\": \"1e28018b5c83\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"24803f38a5c0\", \"lessThan\": \"3dd2aeac2e96\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"24803f38a5c0\", \"lessThan\": \"ac31cc837caf\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"24803f38a5c0\", \"lessThan\": \"77de6ee73f54\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"24803f38a5c0\", \"lessThan\": \"d8e2973029b8\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.9\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.9\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"4.9.274\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.0\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"4.14.238\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.15\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"4.19.196\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.20\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.4.128\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.5\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.10.46\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.11\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.12.13\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.13\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.13\"}], \"defaultStatus\": \"unknown\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400 Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-12T18:43:58.230Z\"}}], \"cna\": {\"title\": \"net: ipv4: fix memory leak in ip_mc_add1_src\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"24803f38a5c0b6c57ed800b47e695f9ce474bc3a\", \"lessThan\": \"0dc13e75507faa17ac9f7562b4ef7bf8fcd78422\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"24803f38a5c0b6c57ed800b47e695f9ce474bc3a\", \"lessThan\": \"6cff57eea3347f79f1867cc53e1093b6614138d8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"24803f38a5c0b6c57ed800b47e695f9ce474bc3a\", \"lessThan\": \"1e28018b5c83d5073f74a6fb72eabe8370b2f501\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"24803f38a5c0b6c57ed800b47e695f9ce474bc3a\", \"lessThan\": \"3dd2aeac2e9624cff9fa634710837e4f2e352758\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"24803f38a5c0b6c57ed800b47e695f9ce474bc3a\", \"lessThan\": \"ac31cc837cafb57a271babad8ccffbf733caa076\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"24803f38a5c0b6c57ed800b47e695f9ce474bc3a\", \"lessThan\": \"77de6ee73f54a9a89c0afa0bf4c53b239aa9953a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"24803f38a5c0b6c57ed800b47e695f9ce474bc3a\", \"lessThan\": \"d8e2973029b8b2ce477b564824431f3385c77083\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bd1b664a19403ede448d29c87b2f23796bc7a577\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b38c6e0bd5b5e439ecebdc0df599d573c2f610f8\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv4/igmp.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.9\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.9.274\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.238\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.196\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.128\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.46\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/igmp.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0dc13e75507faa17ac9f7562b4ef7bf8fcd78422\"}, {\"url\": \"https://git.kernel.org/stable/c/6cff57eea3347f79f1867cc53e1093b6614138d8\"}, {\"url\": \"https://git.kernel.org/stable/c/1e28018b5c83d5073f74a6fb72eabe8370b2f501\"}, {\"url\": \"https://git.kernel.org/stable/c/3dd2aeac2e9624cff9fa634710837e4f2e352758\"}, {\"url\": \"https://git.kernel.org/stable/c/ac31cc837cafb57a271babad8ccffbf733caa076\"}, {\"url\": \"https://git.kernel.org/stable/c/77de6ee73f54a9a89c0afa0bf4c53b239aa9953a\"}, {\"url\": \"https://git.kernel.org/stable/c/d8e2973029b8b2ce477b564824431f3385c77083\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: ipv4: fix memory leak in ip_mc_add1_src\\n\\nBUG: memory leak\\nunreferenced object 0xffff888101bc4c00 (size 32):\\n  comm \\\"syz-executor527\\\", pid 360, jiffies 4294807421 (age 19.329s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\\n    01 00 00 00 00 00 00 00 ac 14 14 bb 00 00 02 00 ................\\n  backtrace:\\n    [\u003c00000000f17c5244\u003e] kmalloc include/linux/slab.h:558 [inline]\\n    [\u003c00000000f17c5244\u003e] kzalloc include/linux/slab.h:688 [inline]\\n    [\u003c00000000f17c5244\u003e] ip_mc_add1_src net/ipv4/igmp.c:1971 [inline]\\n    [\u003c00000000f17c5244\u003e] ip_mc_add_src+0x95f/0xdb0 net/ipv4/igmp.c:2095\\n    [\u003c000000001cb99709\u003e] ip_mc_source+0x84c/0xea0 net/ipv4/igmp.c:2416\\n    [\u003c0000000052cf19ed\u003e] do_ip_setsockopt net/ipv4/ip_sockglue.c:1294 [inline]\\n    [\u003c0000000052cf19ed\u003e] ip_setsockopt+0x114b/0x30c0 net/ipv4/ip_sockglue.c:1423\\n    [\u003c00000000477edfbc\u003e] raw_setsockopt+0x13d/0x170 net/ipv4/raw.c:857\\n    [\u003c00000000e75ca9bb\u003e] __sys_setsockopt+0x158/0x270 net/socket.c:2117\\n    [\u003c00000000bdb993a8\u003e] __do_sys_setsockopt net/socket.c:2128 [inline]\\n    [\u003c00000000bdb993a8\u003e] __se_sys_setsockopt net/socket.c:2125 [inline]\\n    [\u003c00000000bdb993a8\u003e] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2125\\n    [\u003c000000006a1ffdbd\u003e] do_syscall_64+0x40/0x80 arch/x86/entry/common.c:47\\n    [\u003c00000000b11467c4\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nIn commit 24803f38a5c0 (\\\"igmp: do not remove igmp souce list info when set\\nlink down\\\"), the ip_mc_clear_src() in ip_mc_destroy_dev() was removed,\\nbecause it was also called in igmpv3_clear_delrec().\\n\\nRough callgraph:\\n\\ninetdev_destroy\\n-\u003e ip_mc_destroy_dev\\n     -\u003e igmpv3_clear_delrec\\n        -\u003e ip_mc_clear_src\\n-\u003e RCU_INIT_POINTER(dev-\u003eip_ptr, NULL)\\n\\nHowever, ip_mc_clear_src() called in igmpv3_clear_delrec() doesn\u0027t\\nrelease in_dev-\u003emc_list-\u003esources. And RCU_INIT_POINTER() assigns the\\nNULL to dev-\u003eip_ptr. As a result, in_dev cannot be obtained through\\ninetdev_by_index() and then in_dev-\u003emc_list-\u003esources cannot be released\\nby ip_mc_del1_src() in the sock_close. Rough call sequence goes like:\\n\\nsock_close\\n-\u003e __sock_release\\n   -\u003e inet_release\\n      -\u003e ip_mc_drop_socket\\n         -\u003e inetdev_by_index\\n         -\u003e ip_mc_leave_src\\n            -\u003e ip_mc_del_src\\n               -\u003e ip_mc_del1_src\\n\\nSo we still need to call ip_mc_clear_src() in ip_mc_destroy_dev() to free\\nin_dev-\u003emc_list-\u003esources.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.274\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.238\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.196\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.128\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.46\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.13\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.2.87\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.16.42\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T12:41:17.545Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47238\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T12:41:17.545Z\", \"dateReserved\": \"2024-04-10T18:59:19.532Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:19:39.041Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.