{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2024-26956",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-26956",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-01T05:18:56.101Z",
    "updatedAt": "2026-05-11T20:07:38.180Z",
    "importedAt": "2026-10-24T01:57:07.518Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "nilfs2: fix failure to detect DAT corruption in btree and direct mappings",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix failure to detect DAT corruption in btree and direct mappings\n\nPatch series \"nilfs2: fix kernel bug at submit_bh_wbc()\".\n\nThis resolves a kernel BUG reported by syzbot.  Since there are two\nflaws involved, I've made each one a separate patch.\n\nThe first patch alone resolves the syzbot-reported bug, but I think\nboth fixes should be sent to stable, so I've tagged them as such.\n\n\nThis patch (of 2):\n\nSyzbot has reported a kernel bug in submit_bh_wbc() when writing file data\nto a nilfs2 file system whose metadata is corrupted.\n\nThere are two flaws involved in this issue.\n\nThe first flaw is that when nilfs_get_block() locates a data block using\nbtree or direct mapping, if the disk address translation routine\nnilfs_dat_translate() fails with internal code -ENOENT due to DAT metadata\ncorruption, it can be passed back to nilfs_get_block().  This causes\nnilfs_get_block() to misidentify an existing block as non-existent,\ncausing both data block lookup and insertion to fail inconsistently.\n\nThe second flaw is that nilfs_get_block() returns a successful status in\nthis inconsistent state.  This causes the caller __block_write_begin_int()\nor others to request a read even though the buffer is not mapped,\nresulting in a BUG_ON check for the BH_Mapped flag in submit_bh_wbc()\nfailing.\n\nThis fixes the first issue by changing the return value to code -EINVAL\nwhen a conversion using DAT fails with code -ENOENT, avoiding the\nconflicting condition that leads to the kernel bug described above.  Here,\ncode -EINVAL indicates that metadata corruption was detected during the\nblock lookup, which will be properly handled as a file system error and\nconverted to -EIO when passing through the nilfs2 bmap layer.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c3a7abf06ce719a51139e62a034590be99abbc2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b67189690eb4b7ecc84ae16fa1e880e0123eaa35"
            },
            {
              "version": "c3a7abf06ce719a51139e62a034590be99abbc2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9cbe1ad5f4354f4df1445e5f4883983328cd6d8e"
            },
            {
              "version": "c3a7abf06ce719a51139e62a034590be99abbc2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c3b5c5c31e723b568f83d8cafab8629d9d830ffb"
            },
            {
              "version": "c3a7abf06ce719a51139e62a034590be99abbc2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2e2619ff5d0def4bb6c2037a32a6eaa28dd95c84"
            },
            {
              "version": "c3a7abf06ce719a51139e62a034590be99abbc2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "46b832e09d43b394ac0f6d9485d2b1a06593f0b7"
            },
            {
              "version": "c3a7abf06ce719a51139e62a034590be99abbc2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f69e81396aea66304d214f175aa371f1b5578862"
            },
            {
              "version": "c3a7abf06ce719a51139e62a034590be99abbc2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a8e4d098de1c0f4c5c1f2ed4633a860f0da6d713"
            },
            {
              "version": "c3a7abf06ce719a51139e62a034590be99abbc2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "82827ca21e7c8a91384c5baa656f78a5adfa4ab4"
            },
            {
              "version": "c3a7abf06ce719a51139e62a034590be99abbc2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f2f26b4a84a0ef41791bd2d70861c8eac748f4ba"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.31",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.31"
            },
            {
              "version": "4.19.312",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.274",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.215",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.154",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.84",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.24",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.7.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.7.*"
            },
            {
              "version": "6.8.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.8.*"
            },
            {
              "version": "6.9",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}