{
  "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-2026-43266",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-43266",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-06T11:28:52.238Z",
    "updatedAt": "2026-05-11T22:21:14.159Z",
    "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": "EFI/CPER: don't go past the ARM processor CPER record buffer",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nEFI/CPER: don't go past the ARM processor CPER record buffer\n\nThere's a logic inside GHES/CPER to detect if the section_length\nis too small, but it doesn't detect if it is too big.\n\nCurrently, if the firmware receives an ARM processor CPER record\nstating that a section length is big, kernel will blindly trust\nsection_length, producing a very long dump. For instance, a 67\nbytes record with ERR_INFO_NUM set 46198 and section length\nset to 854918320 would dump a lot of data going a way past the\nfirmware memory-mapped area.\n\nFix it by adding a logic to prevent it to go past the buffer\nif ERR_INFO_NUM is too big, making it report instead:\n\n\t[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 1\n\t[Hardware Error]: event severity: recoverable\n\t[Hardware Error]:  Error 0, type: recoverable\n\t[Hardware Error]:   section_type: ARM processor error\n\t[Hardware Error]:   MIDR: 0xff304b2f8476870a\n\t[Hardware Error]:   section length: 854918320, CPER size: 67\n\t[Hardware Error]:   section length is too big\n\t[Hardware Error]:   firmware-generated error record is incorrect\n\t[Hardware Error]:   ERR_INFO_NUM is 46198\n\n[ rjw: Subject and changelog tweaks ]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2f74f09bce4f8d0236f20174a6daae63e10fe733",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c80113dcfc807308f5ab33847fae77e07531aeb8"
            },
            {
              "version": "2f74f09bce4f8d0236f20174a6daae63e10fe733",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ca2aad8771aa9091bc9e42e7d546bd40b72ddcd4"
            },
            {
              "version": "2f74f09bce4f8d0236f20174a6daae63e10fe733",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a68d22902a6916e10ee235fee609239004e129d0"
            },
            {
              "version": "2f74f09bce4f8d0236f20174a6daae63e10fe733",
              "status": "affected",
              "versionType": "git",
              "lessThan": "64eb63f573f497553e1a0c388bbcdd639e0f0704"
            },
            {
              "version": "2f74f09bce4f8d0236f20174a6daae63e10fe733",
              "status": "affected",
              "versionType": "git",
              "lessThan": "be10c1bdf64a39832998f54900aa309b3917abcf"
            },
            {
              "version": "2f74f09bce4f8d0236f20174a6daae63e10fe733",
              "status": "affected",
              "versionType": "git",
              "lessThan": "25b290624b0e3d2f0f90238709ee0b6009b9fde8"
            },
            {
              "version": "2f74f09bce4f8d0236f20174a6daae63e10fe733",
              "status": "affected",
              "versionType": "git",
              "lessThan": "45766863baf899059e75595dd3cb1116467f2095"
            },
            {
              "version": "2f74f09bce4f8d0236f20174a6daae63e10fe733",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eae21beecb95a3b69ee5c38a659f774e171d730e"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.13"
            },
            {
              "version": "5.10.252",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.202",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.165",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.128",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.75",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.16",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}