{
  "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-2026-46130",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46130",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-28T09:35:45.387Z",
    "updatedAt": "2026-10-21T12:41:19.483Z",
    "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": "dm-verity-fec: fix reading parity bytes split across blocks (take 3)",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-verity-fec: fix reading parity bytes split across blocks (take 3)\n\nfec_decode_bufs() assumes that the parity bytes of the first RS codeword\nit decodes are never split across parity blocks.\n\nThis assumption is false.  Consider v->fec->block_size == 4096 &&\nv->fec->roots == 17 && fio->nbufs == 1, for example.  In that case, each\ncall to fec_decode_bufs() consumes v->fec->roots * (fio->nbufs <<\nDM_VERITY_FEC_BUF_RS_BITS) = 272 parity bytes.\n\nConsidering that the parity data for each message block starts on a\nblock boundary, the byte alignment in the parity data will iterate\nthrough 272*i mod 4096 until the 3 parity blocks have been consumed.  On\nthe 16th call (i=15), the alignment will be 4080 bytes into the first\nblock.  Only 16 bytes remain in that block, but 17 parity bytes will be\nneeded.  The code reads out-of-bounds from the parity block buffer.\n\nFortunately this doesn't normally happen, since it can occur only for\ncertain non-default values of fec_roots *and* when the maximum number of\nbuffers couldn't be allocated due to low memory.  For example with\nblock_size=4096 only the following cases are affected:\n\n    fec_roots=17: nbufs in [1, 3, 5, 15]\n    fec_roots=19: nbufs in [1, 229]\n    fec_roots=21: nbufs in [1, 3, 5, 13, 15, 39, 65, 195]\n    fec_roots=23: nbufs in [1, 89]\n\nRegardless, fix it by refactoring how the parity blocks are read.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "12caa73a28f0ae147ec0356b45091edf2462462b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "03348b440f69417dc3a3c71d8271cff6b05f67fb"
            },
            {
              "version": "fc8943886629e26de34867db302c74d465510826",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dac69d1b76049d7e5f565089a6a7f4502a85b9de"
            },
            {
              "version": "6df90c02bae468a3a6110bafbc659884d0c4966c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d47281b9a4472cfd73122393e79fbe76b651e46a"
            },
            {
              "version": "6df90c02bae468a3a6110bafbc659884d0c4966c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3d1b4e2d8ac0a1a1390a117f61ce0ca1c47e3bcb"
            },
            {
              "version": "6df90c02bae468a3a6110bafbc659884d0c4966c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "430a05cb926f6bdf53e81460a2c3a553257f3f61"
            },
            {
              "version": "6bc6ee31113b05db605694491bdeb2b1730142f1",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6.6.72",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.160"
            },
            {
              "version": "6.12.10",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.114"
            },
            {
              "version": "6.1.125",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.2"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.13"
            },
            {
              "version": "6.6.160",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.114",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.42",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}