CVE-2026-53033 (GCVE-0-2026-53033)
Vulnerability from cvelistv5
Published
2026-06-24 16:29
Modified
2026-10-19 19:47
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Take state lock for af_unix iter When a BPF iterator program updates a sockmap, there is a race condition in unix_stream_bpf_update_proto() where the `peer` pointer can become stale[1] during a state transition TCP_ESTABLISHED -> TCP_CLOSE. CPU0 bpf CPU1 close -------- ---------- // unix_stream_bpf_update_proto() sk_pair = unix_peer(sk) if (unlikely(!sk_pair)) return -EINVAL; // unix_release_sock() skpair = unix_peer(sk); unix_peer(sk) = NULL; sock_put(skpair) sock_hold(sk_pair) // UaF More practically, this fix guarantees that the iterator program is consistently provided with a unix socket that remains stable during iterator execution. [1]: BUG: KASAN: slab-use-after-free in unix_stream_bpf_update_proto+0x155/0x490 Write of size 4 at addr ffff8881178c9a00 by task test_progs/2231 Call Trace: dump_stack_lvl+0x5d/0x80 print_report+0x170/0x4f3 kasan_report+0xe4/0x1c0 kasan_check_range+0x125/0x200 unix_stream_bpf_update_proto+0x155/0x490 sock_map_link+0x71c/0xec0 sock_map_update_common+0xbc/0x600 sock_map_update_elem+0x19a/0x1f0 bpf_prog_bbbf56096cdd4f01_selective_dump_unix+0x20c/0x217 bpf_iter_run_prog+0x21e/0xae0 bpf_iter_unix_seq_show+0x1e0/0x2a0 bpf_seq_read+0x42c/0x10d0 vfs_read+0x171/0xb20 ksys_read+0xff/0x200 do_syscall_64+0xf7/0x5e0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Allocated by task 2236: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x63/0x80 kmem_cache_alloc_noprof+0x1d5/0x680 sk_prot_alloc+0x59/0x210 sk_alloc+0x34/0x470 unix_create1+0x86/0x8a0 unix_stream_connect+0x318/0x15b0 __sys_connect+0xfd/0x130 __x64_sys_connect+0x72/0xd0 do_syscall_64+0xf7/0x5e0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Freed by task 2236: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x70 __kasan_slab_free+0x47/0x70 kmem_cache_free+0x11c/0x590 __sk_destruct+0x432/0x6e0 unix_release_sock+0x9b3/0xf60 unix_release+0x8a/0xf0 __sock_release+0xb0/0x270 sock_close+0x18/0x20 __fput+0x36e/0xac0 fput_close_sync+0xe5/0x1a0 __x64_sys_close+0x7d/0xd0 do_syscall_64+0xf7/0x5e0 entry_SYSCALL_64_after_hwframe+0x76/0x7e
References
Impacted products
Vendor Product Version
Linux Linux Version: 2c860a43dd77f969bb959336a2f743d7103a8f63
Version: 2c860a43dd77f969bb959336a2f743d7103a8f63
Version: 2c860a43dd77f969bb959336a2f743d7103a8f63
Version: 2c860a43dd77f969bb959336a2f743d7103a8f63
Version: 2c860a43dd77f969bb959336a2f743d7103a8f63
Version: 2c860a43dd77f969bb959336a2f743d7103a8f63
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10"
            ],
            "defaultStatus": "affected",
            "packageName": "kernel",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:6"
            ],
            "defaultStatus": "unaffected",
            "packageName": "kernel",
            "product": "Red Hat Enterprise Linux 6",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:7"
            ],
            "defaultStatus": "unaffected",
            "packageName": "kernel",
            "product": "Red Hat Enterprise Linux 7",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:7"
            ],
            "defaultStatus": "unaffected",
            "packageName": "kernel-rt",
            "product": "Red Hat Enterprise Linux 7",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "unaffected",
            "packageName": "kernel",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "unaffected",
            "packageName": "kernel-rt",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "affected",
            "packageName": "kernel",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "affected",
            "packageName": "kernel-rt",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-06-24T00:00:00.000Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in the Linux kernel\u0027s sockmap functionality. A race condition exists in the unix_stream_bpf_update_proto() function when a BPF (Berkeley Packet Filter) iterator program updates a sockmap. This can lead to a use-after-free (UaF) vulnerability, where memory is accessed after it has been freed. An attacker could potentially exploit this to cause a denial of service or achieve arbitrary code execution."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Moderate"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 6.4,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "HIGH",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-825",
                "description": "Expired Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-15T00:45:13.077Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-53033"
          },
          {
            "name": "RHBZ#2492281",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492281"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53033.json"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-06-24T00:00:00.000Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-06-24T00:00:00.000Z",
            "value": "Made public."
          }
        ],
        "title": "kernel: bpf, sockmap: Take state lock for af_unix iter",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-53033",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T15:24:51.495444Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-825",
                "description": "CWE-825 Expired Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-19T19:47:14.287Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/unix/af_unix.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c6f4015eac2e3cbc3cb7a17539e10bbb5c2049c3",
              "status": "affected",
              "version": "2c860a43dd77f969bb959336a2f743d7103a8f63",
              "versionType": "git"
            },
            {
              "lessThan": "d0d124dbcef9318e326956137b31671407094bd4",
              "status": "affected",
              "version": "2c860a43dd77f969bb959336a2f743d7103a8f63",
              "versionType": "git"
            },
            {
              "lessThan": "1a59cc6b65fd3ad9915aae5970d859109d4ce9fb",
              "status": "affected",
              "version": "2c860a43dd77f969bb959336a2f743d7103a8f63",
              "versionType": "git"
            },
            {
              "lessThan": "921920c34cb591947dd30c692500795a69f1e3fa",
              "status": "affected",
              "version": "2c860a43dd77f969bb959336a2f743d7103a8f63",
              "versionType": "git"
            },
            {
              "lessThan": "98f744d204e5d6fca589cd2c44c3190a0c71697f",
              "status": "affected",
              "version": "2c860a43dd77f969bb959336a2f743d7103a8f63",
              "versionType": "git"
            },
            {
              "lessThan": "64c2f93fc3254d3bf5de4445fb732ee5c451edb6",
              "status": "affected",
              "version": "2c860a43dd77f969bb959336a2f743d7103a8f63",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/unix/af_unix.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.141",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.91",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Take state lock for af_unix iter\n\nWhen a BPF iterator program updates a sockmap, there is a race condition in\nunix_stream_bpf_update_proto() where the `peer` pointer can become stale[1]\nduring a state transition TCP_ESTABLISHED -\u003e TCP_CLOSE.\n\n        CPU0 bpf                          CPU1 close\n        --------                          ----------\n// unix_stream_bpf_update_proto()\nsk_pair = unix_peer(sk)\nif (unlikely(!sk_pair))\n   return -EINVAL;\n                                     // unix_release_sock()\n                                     skpair = unix_peer(sk);\n                                     unix_peer(sk) = NULL;\n                                     sock_put(skpair)\nsock_hold(sk_pair) // UaF\n\nMore practically, this fix guarantees that the iterator program is\nconsistently provided with a unix socket that remains stable during\niterator execution.\n\n[1]:\nBUG: KASAN: slab-use-after-free in unix_stream_bpf_update_proto+0x155/0x490\nWrite of size 4 at addr ffff8881178c9a00 by task test_progs/2231\nCall Trace:\n dump_stack_lvl+0x5d/0x80\n print_report+0x170/0x4f3\n kasan_report+0xe4/0x1c0\n kasan_check_range+0x125/0x200\n unix_stream_bpf_update_proto+0x155/0x490\n sock_map_link+0x71c/0xec0\n sock_map_update_common+0xbc/0x600\n sock_map_update_elem+0x19a/0x1f0\n bpf_prog_bbbf56096cdd4f01_selective_dump_unix+0x20c/0x217\n bpf_iter_run_prog+0x21e/0xae0\n bpf_iter_unix_seq_show+0x1e0/0x2a0\n bpf_seq_read+0x42c/0x10d0\n vfs_read+0x171/0xb20\n ksys_read+0xff/0x200\n do_syscall_64+0xf7/0x5e0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nAllocated by task 2236:\n kasan_save_stack+0x30/0x50\n kasan_save_track+0x14/0x30\n __kasan_slab_alloc+0x63/0x80\n kmem_cache_alloc_noprof+0x1d5/0x680\n sk_prot_alloc+0x59/0x210\n sk_alloc+0x34/0x470\n unix_create1+0x86/0x8a0\n unix_stream_connect+0x318/0x15b0\n __sys_connect+0xfd/0x130\n __x64_sys_connect+0x72/0xd0\n do_syscall_64+0xf7/0x5e0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFreed by task 2236:\n kasan_save_stack+0x30/0x50\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3b/0x70\n __kasan_slab_free+0x47/0x70\n kmem_cache_free+0x11c/0x590\n __sk_destruct+0x432/0x6e0\n unix_release_sock+0x9b3/0xf60\n unix_release+0x8a/0xf0\n __sock_release+0xb0/0x270\n sock_close+0x18/0x20\n __fput+0x36e/0xac0\n fput_close_sync+0xe5/0x1a0\n __x64_sys_close+0x7d/0xd0\n do_syscall_64+0xf7/0x5e0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation is through local syscalls: loading/attaching a BPF Unix-socket iterator, creating/updating a sockmap, reading the iterator fd, and racing an AF_UNIX socket close. No remote network packet path reaches this iterator execution.\nAC:L - The attacker can create the AF_UNIX sockets, run the iterator read, and close the peer concurrently, controlling both sides of the race. No external victim timing or uncommon state is required beyond winning an attacker-orchestrated race.\nPR:L - The non-delegated path requires BPF-related capabilities, but BPF tokens can delegate the needed CAP_BPF/CAP_PERFMON/CAP_NET_ADMIN checks into a non-init user namespace. Under the higher-severity rule, this is best treated as reachable with low delegated local privileges rather than requiring init-namespace root.\nUI:N - No victim action is needed after the attacker has local execution and the required BPF access. The attacker triggers the iterator read and socket close directly.\nS:U - The bug corrupts kernel memory within the same OS security authority. It is not a VM escape, IOMMU bypass, or cross-scope boundary violation.\nC:H - The bug is a slab use-after-free on an AF_UNIX peer socket object during `sock_hold()`. Per kernel UAF guidance, this memory corruption can be leveraged for kernel memory disclosure in a plausible exploit.\nI:H - The stale peer pointer leads to a write to freed memory via the socket refcount increment. As a kernel UAF/write primitive, it is reasonably treated as enabling arbitrary corruption or control-flow compromise.\nA:H - The reported failure is a KASAN slab-use-after-free in kernel context and can crash or oops the kernel. Repeated local triggering can cause high availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:32:46.155Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c6f4015eac2e3cbc3cb7a17539e10bbb5c2049c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/d0d124dbcef9318e326956137b31671407094bd4"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a59cc6b65fd3ad9915aae5970d859109d4ce9fb"
        },
        {
          "url": "https://git.kernel.org/stable/c/921920c34cb591947dd30c692500795a69f1e3fa"
        },
        {
          "url": "https://git.kernel.org/stable/c/98f744d204e5d6fca589cd2c44c3190a0c71697f"
        },
        {
          "url": "https://git.kernel.org/stable/c/64c2f93fc3254d3bf5de4445fb732ee5c451edb6"
        }
      ],
      "title": "bpf, sockmap: Take state lock for af_unix iter",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53033",
    "datePublished": "2026-06-24T16:29:40.794Z",
    "dateReserved": "2026-06-09T07:44:35.380Z",
    "dateUpdated": "2026-10-19T19:47:14.287Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:32:46.155Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf, sockmap: Take state lock for af_unix iter\\n\\nWhen a BPF iterator program updates a sockmap, there is a race condition in\\nunix_stream_bpf_update_proto() where the `peer` pointer can become stale[1]\\nduring a state transition TCP_ESTABLISHED -\u003e TCP_CLOSE.\\n\\n        CPU0 bpf                          CPU1 close\\n        --------                          ----------\\n// unix_stream_bpf_update_proto()\\nsk_pair = unix_peer(sk)\\nif (unlikely(!sk_pair))\\n   return -EINVAL;\\n                                     // unix_release_sock()\\n                                     skpair = unix_peer(sk);\\n                                     unix_peer(sk) = NULL;\\n                                     sock_put(skpair)\\nsock_hold(sk_pair) // UaF\\n\\nMore practically, this fix guarantees that the iterator program is\\nconsistently provided with a unix socket that remains stable during\\niterator execution.\\n\\n[1]:\\nBUG: KASAN: slab-use-after-free in unix_stream_bpf_update_proto+0x155/0x490\\nWrite of size 4 at addr ffff8881178c9a00 by task test_progs/2231\\nCall Trace:\\n dump_stack_lvl+0x5d/0x80\\n print_report+0x170/0x4f3\\n kasan_report+0xe4/0x1c0\\n kasan_check_range+0x125/0x200\\n unix_stream_bpf_update_proto+0x155/0x490\\n sock_map_link+0x71c/0xec0\\n sock_map_update_common+0xbc/0x600\\n sock_map_update_elem+0x19a/0x1f0\\n bpf_prog_bbbf56096cdd4f01_selective_dump_unix+0x20c/0x217\\n bpf_iter_run_prog+0x21e/0xae0\\n bpf_iter_unix_seq_show+0x1e0/0x2a0\\n bpf_seq_read+0x42c/0x10d0\\n vfs_read+0x171/0xb20\\n ksys_read+0xff/0x200\\n do_syscall_64+0xf7/0x5e0\\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n\\nAllocated by task 2236:\\n kasan_save_stack+0x30/0x50\\n kasan_save_track+0x14/0x30\\n __kasan_slab_alloc+0x63/0x80\\n kmem_cache_alloc_noprof+0x1d5/0x680\\n sk_prot_alloc+0x59/0x210\\n sk_alloc+0x34/0x470\\n unix_create1+0x86/0x8a0\\n unix_stream_connect+0x318/0x15b0\\n __sys_connect+0xfd/0x130\\n __x64_sys_connect+0x72/0xd0\\n do_syscall_64+0xf7/0x5e0\\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n\\nFreed by task 2236:\\n kasan_save_stack+0x30/0x50\\n kasan_save_track+0x14/0x30\\n kasan_save_free_info+0x3b/0x70\\n __kasan_slab_free+0x47/0x70\\n kmem_cache_free+0x11c/0x590\\n __sk_destruct+0x432/0x6e0\\n unix_release_sock+0x9b3/0xf60\\n unix_release+0x8a/0xf0\\n __sock_release+0xb0/0x270\\n sock_close+0x18/0x20\\n __fput+0x36e/0xac0\\n fput_close_sync+0xe5/0x1a0\\n __x64_sys_close+0x7d/0xd0\\n do_syscall_64+0xf7/0x5e0\\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - Exploitation is through local syscalls: loading/attaching a BPF Unix-socket iterator, creating/updating a sockmap, reading the iterator fd, and racing an AF_UNIX socket close. No remote network packet path reaches this iterator execution.\\nAC:L - The attacker can create the AF_UNIX sockets, run the iterator read, and close the peer concurrently, controlling both sides of the race. No external victim timing or uncommon state is required beyond winning an attacker-orchestrated race.\\nPR:L - The non-delegated path requires BPF-related capabilities, but BPF tokens can delegate the needed CAP_BPF/CAP_PERFMON/CAP_NET_ADMIN checks into a non-init user namespace. Under the higher-severity rule, this is best treated as reachable with low delegated local privileges rather than requiring init-namespace root.\\nUI:N - No victim action is needed after the attacker has local execution and the required BPF access. The attacker triggers the iterator read and socket close directly.\\nS:U - The bug corrupts kernel memory within the same OS security authority. It is not a VM escape, IOMMU bypass, or cross-scope boundary violation.\\nC:H - The bug is a slab use-after-free on an AF_UNIX peer socket object during `sock_hold()`. Per kernel UAF guidance, this memory corruption can be leveraged for kernel memory disclosure in a plausible exploit.\\nI:H - The stale peer pointer leads to a write to freed memory via the socket refcount increment. As a kernel UAF/write primitive, it is reasonably treated as enabling arbitrary corruption or control-flow compromise.\\nA:H - The reported failure is a KASAN slab-use-after-free in kernel context and can crash or oops the kernel. Repeated local triggering can cause high availability impact.\"}]}], \"affected\": [{\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"unaffected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"net/unix/af_unix.c\"], \"versions\": [{\"version\": \"2c860a43dd77f969bb959336a2f743d7103a8f63\", \"lessThan\": \"c6f4015eac2e3cbc3cb7a17539e10bbb5c2049c3\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"2c860a43dd77f969bb959336a2f743d7103a8f63\", \"lessThan\": \"d0d124dbcef9318e326956137b31671407094bd4\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"2c860a43dd77f969bb959336a2f743d7103a8f63\", \"lessThan\": \"1a59cc6b65fd3ad9915aae5970d859109d4ce9fb\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"2c860a43dd77f969bb959336a2f743d7103a8f63\", \"lessThan\": \"921920c34cb591947dd30c692500795a69f1e3fa\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"2c860a43dd77f969bb959336a2f743d7103a8f63\", \"lessThan\": \"98f744d204e5d6fca589cd2c44c3190a0c71697f\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"2c860a43dd77f969bb959336a2f743d7103a8f63\", \"lessThan\": \"64c2f93fc3254d3bf5de4445fb732ee5c451edb6\", \"status\": \"affected\", \"versionType\": \"git\"}]}, {\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"affected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"net/unix/af_unix.c\"], \"versions\": [{\"version\": \"5.15\", \"status\": \"affected\"}, {\"version\": \"0\", \"lessThan\": \"5.15\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"6.1.175\", \"lessThanOrEqual\": \"6.1.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"6.6.141\", \"lessThanOrEqual\": \"6.6.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"6.12.91\", \"lessThanOrEqual\": \"6.12.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"6.18.33\", \"lessThanOrEqual\": \"6.18.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"7.0.10\", \"lessThanOrEqual\": \"7.0.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"7.1\", \"lessThanOrEqual\": \"*\", \"status\": \"unaffected\", \"versionType\": \"original_commit_for_fix\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.15\", \"versionEndExcluding\": \"6.1.175\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.15\", \"versionEndExcluding\": \"6.6.141\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.15\", \"versionEndExcluding\": \"6.12.91\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.15\", \"versionEndExcluding\": \"6.18.33\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.15\", \"versionEndExcluding\": \"7.0.10\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.15\", \"versionEndExcluding\": \"7.1\"}]}]}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c6f4015eac2e3cbc3cb7a17539e10bbb5c2049c3\"}, {\"url\": \"https://git.kernel.org/stable/c/d0d124dbcef9318e326956137b31671407094bd4\"}, {\"url\": \"https://git.kernel.org/stable/c/1a59cc6b65fd3ad9915aae5970d859109d4ce9fb\"}, {\"url\": \"https://git.kernel.org/stable/c/921920c34cb591947dd30c692500795a69f1e3fa\"}, {\"url\": \"https://git.kernel.org/stable/c/98f744d204e5d6fca589cd2c44c3190a0c71697f\"}, {\"url\": \"https://git.kernel.org/stable/c/64c2f93fc3254d3bf5de4445fb732ee5c451edb6\"}], \"title\": \"bpf, sockmap: Take state lock for af_unix iter\", \"x_generator\": {\"engine\": \"bippy-1.2.0\"}}, \"adp\": [{\"affected\": [{\"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"cpes\": [\"cpe:/o:redhat:enterprise_linux:10\"], \"defaultStatus\": \"affected\", \"packageName\": \"kernel\", \"product\": \"Red Hat Enterprise Linux 10\", \"vendor\": \"Red Hat\"}, {\"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"cpes\": [\"cpe:/o:redhat:enterprise_linux:6\"], \"defaultStatus\": \"unaffected\", \"packageName\": \"kernel\", \"product\": \"Red Hat Enterprise Linux 6\", \"vendor\": \"Red Hat\"}, {\"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"cpes\": [\"cpe:/o:redhat:enterprise_linux:7\"], \"defaultStatus\": \"unaffected\", \"packageName\": \"kernel\", \"product\": \"Red Hat Enterprise Linux 7\", \"vendor\": \"Red Hat\"}, {\"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"cpes\": [\"cpe:/o:redhat:enterprise_linux:7\"], \"defaultStatus\": \"unaffected\", \"packageName\": \"kernel-rt\", \"product\": \"Red Hat Enterprise Linux 7\", \"vendor\": \"Red Hat\"}, {\"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"cpes\": [\"cpe:/o:redhat:enterprise_linux:8\"], \"defaultStatus\": \"unaffected\", \"packageName\": \"kernel\", \"product\": \"Red Hat Enterprise Linux 8\", \"vendor\": \"Red Hat\"}, {\"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"cpes\": [\"cpe:/o:redhat:enterprise_linux:8\"], \"defaultStatus\": \"unaffected\", \"packageName\": \"kernel-rt\", \"product\": \"Red Hat Enterprise Linux 8\", \"vendor\": \"Red Hat\"}, {\"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"cpes\": [\"cpe:/o:redhat:enterprise_linux:9\"], \"defaultStatus\": \"affected\", \"packageName\": \"kernel\", \"product\": \"Red Hat Enterprise Linux 9\", \"vendor\": \"Red Hat\"}, {\"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"cpes\": [\"cpe:/o:redhat:enterprise_linux:9\"], \"defaultStatus\": \"affected\", \"packageName\": \"kernel-rt\", \"product\": \"Red Hat Enterprise Linux 9\", \"vendor\": \"Red Hat\"}], \"datePublic\": \"2026-06-24T00:00:00.000Z\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in the Linux kernel\u0027s sockmap functionality. A race condition exists in the unix_stream_bpf_update_proto() function when a BPF (Berkeley Packet Filter) iterator program updates a sockmap. This can lead to a use-after-free (UaF) vulnerability, where memory is accessed after it has been freed. An attacker could potentially exploit this to cause a denial of service or achieve arbitrary code execution.\"}], \"metrics\": [{\"other\": {\"content\": {\"namespace\": \"https://access.redhat.com/security/updates/classification/\", \"value\": \"Moderate\"}, \"type\": \"Red Hat severity rating\"}}, {\"cvssV3_1\": {\"attackComplexity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"availabilityImpact\": \"HIGH\", \"baseScore\": 6.4, \"baseSeverity\": \"MEDIUM\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H\", \"version\": \"3.1\"}, \"format\": \"CVSS\"}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-825\", \"description\": \"Expired Pointer Dereference\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"references\": [{\"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"], \"url\": \"https://access.redhat.com/security/cve/CVE-2026-53033\"}, {\"name\": \"RHBZ#2492281\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"], \"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2492281\"}, {\"tags\": [\"x_sadp-csaf-vex\"], \"url\": \"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53033.json\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-06-24T00:00:00.000Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-06-24T00:00:00.000Z\", \"value\": \"Made public.\"}], \"title\": \"kernel: bpf, sockmap: Take state lock for af_unix iter\", \"x_adpType\": \"supplier\", \"x_generator\": {\"engine\": \"sadp-cli 1.0.0\"}, \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-07-15T00:45:13.077Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-53033\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-16T15:24:51.495444Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-825\", \"description\": \"CWE-825 Expired Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-16T15:24:52.106Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-53033\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Linux\", \"dateReserved\": \"2026-06-09T07:44:35.380Z\", \"datePublished\": \"2026-06-24T16:29:40.794Z\", \"dateUpdated\": \"2026-10-19T19:47:14.287Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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.