{
  "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-2024-39276",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-39276",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-06-25T14:22:38.886Z",
    "updatedAt": "2026-05-23T15:49:57.161Z",
    "importedAt": "2026-10-24T01:57:16.009Z",
    "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": "ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()\n\nSyzbot reports a warning as follows:\n\n============================================\nWARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290\nModules linked in:\nCPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7\nRIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419\nCall Trace:\n <TASK>\n ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375\n generic_shutdown_super+0x136/0x2d0 fs/super.c:641\n kill_block_super+0x44/0x90 fs/super.c:1675\n ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327\n[...]\n============================================\n\nThis is because when finding an entry in ext4_xattr_block_cache_find(), if\next4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown\nin the __entry_find(), won't be put away, and eventually trigger the above\nissue in mb_cache_destroy() due to reference count leakage.\n\nSo call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b878c8a7f08f0c225b6a46ba1ac867e9c5d17807",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9ad75e78747b5a50dc5a52f0f8e92e920a653f16"
            },
            {
              "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592",
              "status": "affected",
              "versionType": "git",
              "lessThan": "896a7e7d0d555ad8b2b46af0c2fa7de7467f9483"
            },
            {
              "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592",
              "status": "affected",
              "versionType": "git",
              "lessThan": "76dc776153a47372719d664e0fc50d6355791abb"
            },
            {
              "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592",
              "status": "affected",
              "versionType": "git",
              "lessThan": "681ff9a09accd8a4379f8bd30b7a1641ee19bb3e"
            },
            {
              "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e941b712e758f615d311946bf98216e79145ccd9"
            },
            {
              "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a95df6f04f2c37291adf26a74205cde0314d4577"
            },
            {
              "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b37c0edef4e66fb21a2fbc211471195a383e5ab8"
            },
            {
              "version": "fb265c9cb49e2074ddcdd4de99728aefdd3b3592",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0c0b4a49d3e7f49690a6827a41faeffad5df7e21"
            },
            {
              "version": "9da1f6d06b7a6d068e68fcfd7cbbf6b586d888e1",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "81313ed2c705d958744882a269bf4a5e3ddec95e",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.19.14",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.19.316"
            },
            {
              "version": "4.14.92",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.20.1",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.21"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.0"
            },
            {
              "version": "4.19.316",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.278",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.219",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.161",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.94",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.34",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.9.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.9.*"
            },
            {
              "version": "6.10",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}