{
  "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-2026-43499",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-43499",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-21T12:17:49.281Z",
    "updatedAt": "2026-10-15T01:19:29.734Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "rtmutex: Use waiter::task instead of current in remove_waiter()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtmutex: Use waiter::task instead of current in remove_waiter()\n\nremove_waiter() is used by the slowlock paths, but it is also used for\nproxy-lock rollback in rt_mutex_start_proxy_lock() when invoked from\nfutex_requeue().\n\nIn the latter case waiter::task is not current, but remove_waiter()\noperates on current for the dequeue operation. That results in several\nproblems:\n\n  1) the rbtree dequeue happens without waiter::task::pi_lock being held\n\n  2) the waiter task's pi_blocked_on state is not cleared, which leaves a\n     dangling pointer primed for UAF around.\n\n  3) rt_mutex_adjust_prio_chain() operates on the wrong top priority waiter\n     task\n\nUse waiter::task instead of current in all related operations in\nremove_waiter() to cure those problems.\n\n[ tglx: Fixup rt_mutex_adjust_prio_chain(), add a comment and amend the\n  \tchangelog ]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8161239a8bcce9ad6b537c04a1fa3b5c68bae693",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f3fa3424bceb128d2be4b3745506b22844b87db7"
            },
            {
              "version": "8161239a8bcce9ad6b537c04a1fa3b5c68bae693",
              "status": "affected",
              "versionType": "git",
              "lessThan": "838ce5cb5d93c3ab8b27e75bc6ad905a94b752fd"
            },
            {
              "version": "8161239a8bcce9ad6b537c04a1fa3b5c68bae693",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d8cce4773c2b23d819baf5abedc62f7b430e8745"
            },
            {
              "version": "8161239a8bcce9ad6b537c04a1fa3b5c68bae693",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8a1fc8d698ac5e5916e3082a0f74450d71f9611f"
            },
            {
              "version": "8161239a8bcce9ad6b537c04a1fa3b5c68bae693",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6d52dfcb2a5db86e346cf51f8fcf2071b8085166"
            },
            {
              "version": "8161239a8bcce9ad6b537c04a1fa3b5c68bae693",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3fb7394a837740770f0d6b4b30567e60786a63f2"
            },
            {
              "version": "8161239a8bcce9ad6b537c04a1fa3b5c68bae693",
              "status": "affected",
              "versionType": "git",
              "lessThan": "88614876370aac8ad1050ad785a4c095ba17ac11"
            },
            {
              "version": "8161239a8bcce9ad6b537c04a1fa3b5c68bae693",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3bfdc63936dd4773109b7b8c280c0f3b5ae7d349"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.39",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.39"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.140",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.86",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.27",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}