{
  "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-2026-93261",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-93261",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-24T15:51:59.638Z",
    "updatedAt": "2026-10-19T09:08:14.521Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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": "locking/lockdep: Fix NULL pointer dereference in __lock_set_class()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nlocking/lockdep: Fix NULL pointer dereference in __lock_set_class()\n\nregister_lock_class() can return NULL when the lock class pool is\nexhausted, graph_lock() fails, or key validation fails. However,\n__lock_set_class() uses the return value directly in pointer arithmetic\nwithout a NULL check:\n\n  class = register_lock_class(lock, subclass, 0);\n  hlock->class_idx = class - lock_classes;\n\nIf class is NULL, this computes a wild offset that corrupts\nhlock->class_idx. The subsequent reacquire_held_locks() call will\ninvoke hlock_class() with this corrupted index, leading to a NULL or\nout-of-bounds pointer dereference.\n\nAdd the missing NULL check, consistent with how __lock_acquire() already\nhandles this case at the same call site.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f6093ff67ea6e347574819ed23e96e0f82a25ffc"
            },
            {
              "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2"
            },
            {
              "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f56e54fd24f05e9de528fcb77f6084f80c8066ce"
            },
            {
              "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5c3bff6cf26e6a54fbf8b893a879c32824d2d50d"
            },
            {
              "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b2113dcd8238bf00ce37a34e67b29cf31d32a545"
            },
            {
              "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e7c69c6695d84220847cca62a45e879e71e79e9d"
            },
            {
              "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9be10f49dfc2e4b472b3a5f346483b67374774b8"
            },
            {
              "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7577e00b9ab506202b9f1a33de3cc8cc6413a4db"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.27",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.27"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.52",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}