{
  "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-2026-31577",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31577",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-24T14:42:08.879Z",
    "updatedAt": "2026-06-14T17:42:01.611Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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 NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map\n\nThe DAT inode's btree node cache (i_assoc_inode) is initialized lazily\nduring btree operations. However, nilfs_mdt_save_to_shadow_map()\nassumes i_assoc_inode is already initialized when copying dirty pages\nto the shadow map during GC.\n\nIf NILFS_IOCTL_CLEAN_SEGMENTS is called immediately after mount before\nany btree operation has occurred on the DAT inode, i_assoc_inode is\nNULL leading to a general protection fault.\n\nFix this by calling nilfs_attach_btree_node_cache() on the DAT inode\nin nilfs_dat_read() at mount time, ensuring i_assoc_inode is always\ninitialized before any GC operation can use it.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "d626fcdabea2258be395a775bdbe09270e9bf73d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6637bbcfb59df5b732a79e5ab1a74886a0b93d59"
            },
            {
              "version": "d05cc5395e36711edad8bdef6945f138d8a7097b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "837c7a59fb58f81b0db33848357f6a5d0d1250ad"
            },
            {
              "version": "e897be17a441fa637cd166fc3de1445131e57692",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7902b1df1520a0880bcda7a3704cfacd17905a83"
            },
            {
              "version": "e897be17a441fa637cd166fc3de1445131e57692",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7318e3549518ce8f14776a489d86488d80d7e2c8"
            },
            {
              "version": "e897be17a441fa637cd166fc3de1445131e57692",
              "status": "affected",
              "versionType": "git",
              "lessThan": "449ec5fc99f45974525ba9eea16b6670c45cd363"
            },
            {
              "version": "e897be17a441fa637cd166fc3de1445131e57692",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c36e206f302f1ddefed92d09ecbba070e1ae079e"
            },
            {
              "version": "e897be17a441fa637cd166fc3de1445131e57692",
              "status": "affected",
              "versionType": "git",
              "lessThan": "41de342278ae025c99cc8d33648773f05e306cf1"
            },
            {
              "version": "e897be17a441fa637cd166fc3de1445131e57692",
              "status": "affected",
              "versionType": "git",
              "lessThan": "97fb7afec404912d967a7d4715f37742666b3084"
            },
            {
              "version": "e897be17a441fa637cd166fc3de1445131e57692",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4a4e0328edd9e9755843787d28f16dd4165f8b48"
            },
            {
              "version": "6c3da8c0a35bbafe359d9166269d5590f29664de",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "605babb979c213737618b1c837e89624e5ab11fd",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "307d021b1a7f33048b624f7aaeaa75e3eae571f1",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "1829b24a36ca12ca95b96d5478faeff40c17f2b6",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.10.118",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.258"
            },
            {
              "version": "5.15.42",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.209"
            },
            {
              "version": "4.14.296",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.19.245",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.4.196",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.17.10",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.18"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.18",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.18"
            },
            {
              "version": "5.10.258",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.136",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.83",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.24",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.14",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0.1",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}