CVE-2024-50278 (GCVE-0-2024-50278)
Vulnerability from cvelistv5
Published
2024-11-19 01:30
Modified
2026-05-11 20:49
Summary
In the Linux kernel, the following vulnerability has been resolved: dm cache: fix potential out-of-bounds access on the first resume Out-of-bounds access occurs if the fast device is expanded unexpectedly before the first-time resume of the cache table. This happens because expanding the fast device requires reloading the cache table for cache_create to allocate new in-core data structures that fit the new size, and the check in cache_preresume is not performed during the first resume, leading to the issue. Reproduce steps: 1. prepare component devices: dmsetup create cmeta --table "0 8192 linear /dev/sdc 0" dmsetup create cdata --table "0 65536 linear /dev/sdc 8192" dmsetup create corig --table "0 524288 linear /dev/sdc 262144" dd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct 2. load a cache table of 512 cache blocks, and deliberately expand the fast device before resuming the cache, making the in-core data structures inadequate. dmsetup create cache --notable dmsetup reload cache --table "0 524288 cache /dev/mapper/cmeta \ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0" dmsetup reload cdata --table "0 131072 linear /dev/sdc 8192" dmsetup resume cdata dmsetup resume cache 3. suspend the cache to write out the in-core dirty bitset and hint array, leading to out-of-bounds access to the dirty bitset at offset 0x40: dmsetup suspend cache KASAN reports: BUG: KASAN: vmalloc-out-of-bounds in is_dirty_callback+0x2b/0x80 Read of size 8 at addr ffffc90000085040 by task dmsetup/90 (...snip...) The buggy address belongs to the virtual mapping at [ffffc90000085000, ffffc90000087000) created by: cache_ctr+0x176a/0x35f0 (...snip...) Memory state around the buggy address: ffffc90000084f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90000084f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffffc90000085000: 00 00 00 00 00 00 00 00 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc90000085080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90000085100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 Fix by checking the size change on the first resume.
Impacted products
Vendor Product Version
Linux Linux Version: f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498
Version: f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498
Version: f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498
Version: f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498
Version: f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498
Version: f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498
Version: f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498
Version: f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-50278",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T20:14:46.745309Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T20:17:22.503Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T22:27:56.948Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-cache-target.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e492f71854ce03474d49e87fd98b8df1f7cd1d2d",
              "status": "affected",
              "version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498",
              "versionType": "git"
            },
            {
              "lessThan": "2222b0929d00e2d13732b799b63be391b5de4492",
              "status": "affected",
              "version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498",
              "versionType": "git"
            },
            {
              "lessThan": "483b7261b35a9d369082ab298a6670912243f0be",
              "status": "affected",
              "version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498",
              "versionType": "git"
            },
            {
              "lessThan": "fdef3b94dfebd57e3077a578b6e309a2bb6fa688",
              "status": "affected",
              "version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498",
              "versionType": "git"
            },
            {
              "lessThan": "c52ec00cb2f9bebfada22edcc0db385b910a1cdb",
              "status": "affected",
              "version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498",
              "versionType": "git"
            },
            {
              "lessThan": "036dd6e3d2638103e0092864577ea1d091466b86",
              "status": "affected",
              "version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498",
              "versionType": "git"
            },
            {
              "lessThan": "13ed3624c6ef283acefa4cc42cc8ae54fd4391a4",
              "status": "affected",
              "version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498",
              "versionType": "git"
            },
            {
              "lessThan": "c0ade5d98979585d4f5a93e4514c2e9a65afa08d",
              "status": "affected",
              "version": "f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-cache-target.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.324",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.286",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.230",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.172",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.61",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.324",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.286",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.230",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.172",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.117",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.61",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11.8",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm cache: fix potential out-of-bounds access on the first resume\n\nOut-of-bounds access occurs if the fast device is expanded unexpectedly\nbefore the first-time resume of the cache table. This happens because\nexpanding the fast device requires reloading the cache table for\ncache_create to allocate new in-core data structures that fit the new\nsize, and the check in cache_preresume is not performed during the\nfirst resume, leading to the issue.\n\nReproduce steps:\n\n1. prepare component devices:\n\ndmsetup create cmeta --table \"0 8192 linear /dev/sdc 0\"\ndmsetup create cdata --table \"0 65536 linear /dev/sdc 8192\"\ndmsetup create corig --table \"0 524288 linear /dev/sdc 262144\"\ndd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct\n\n2. load a cache table of 512 cache blocks, and deliberately expand the\n   fast device before resuming the cache, making the in-core data\n   structures inadequate.\n\ndmsetup create cache --notable\ndmsetup reload cache --table \"0 524288 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\"\ndmsetup reload cdata --table \"0 131072 linear /dev/sdc 8192\"\ndmsetup resume cdata\ndmsetup resume cache\n\n3. suspend the cache to write out the in-core dirty bitset and hint\n   array, leading to out-of-bounds access to the dirty bitset at offset\n   0x40:\n\ndmsetup suspend cache\n\nKASAN reports:\n\n  BUG: KASAN: vmalloc-out-of-bounds in is_dirty_callback+0x2b/0x80\n  Read of size 8 at addr ffffc90000085040 by task dmsetup/90\n\n  (...snip...)\n  The buggy address belongs to the virtual mapping at\n   [ffffc90000085000, ffffc90000087000) created by:\n   cache_ctr+0x176a/0x35f0\n\n  (...snip...)\n  Memory state around the buggy address:\n   ffffc90000084f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n   ffffc90000084f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n  \u003effffc90000085000: 00 00 00 00 00 00 00 00 f8 f8 f8 f8 f8 f8 f8 f8\n                                             ^\n   ffffc90000085080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n   ffffc90000085100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n\nFix by checking the size change on the first resume."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:49:02.005Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e492f71854ce03474d49e87fd98b8df1f7cd1d2d"
        },
        {
          "url": "https://git.kernel.org/stable/c/2222b0929d00e2d13732b799b63be391b5de4492"
        },
        {
          "url": "https://git.kernel.org/stable/c/483b7261b35a9d369082ab298a6670912243f0be"
        },
        {
          "url": "https://git.kernel.org/stable/c/fdef3b94dfebd57e3077a578b6e309a2bb6fa688"
        },
        {
          "url": "https://git.kernel.org/stable/c/c52ec00cb2f9bebfada22edcc0db385b910a1cdb"
        },
        {
          "url": "https://git.kernel.org/stable/c/036dd6e3d2638103e0092864577ea1d091466b86"
        },
        {
          "url": "https://git.kernel.org/stable/c/13ed3624c6ef283acefa4cc42cc8ae54fd4391a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/c0ade5d98979585d4f5a93e4514c2e9a65afa08d"
        }
      ],
      "title": "dm cache: fix potential out-of-bounds access on the first resume",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50278",
    "datePublished": "2024-11-19T01:30:19.352Z",
    "dateReserved": "2024-10-21T19:36:19.983Z",
    "dateUpdated": "2026-05-11T20:49:02.005Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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.


Loading…

Loading…