{
  "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-2026-89969",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89969",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-16T10:32:49.603Z",
    "updatedAt": "2026-10-19T08:55:42.820Z",
    "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": "nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: fix out-of-bounds write when receiving an over-long PDU\n\nnvmet_tcp_try_recv_pdu() reads a PDU header into the fixed 128-byte\nqueue->pdu union, then computes the remaining payload length as\n\n\tqueue->left = hdr->hlen - queue->offset + hdgst;\n\nand reads that many more bytes into &queue->pdu + queue->offset, without\never bounding the result against sizeof(queue->pdu).\n\nA struct nvme_tcp_icreq_pdu is itself 128 bytes, exactly the size of the\nunion. Once a header digest has been negotiated (hdgst = 4), a second\nICReq passes the hlen == nvmet_tcp_pdu_size() check but yields\nqueue->left = 128 - 8 + 4 = 124, so bytes 8..132 are written into the\n128-byte buffer -- 4 bytes past its end, over queue->hdr_digest and\nqueue->data_digest. Those bytes are attacker-controlled (an ICReq\ncarries no digest), and the duplicate ICReq is only rejected later,\nafter the overflow. A remote unauthenticated host can thus corrupt\nkernel memory adjacent to the receive buffer.\n\nReject any PDU whose declared length would read past the end of\nqueue->pdu before the second recv.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a3f0bcfbaf3312a5754d1ce020a07d394669eb25"
            },
            {
              "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4f84d42c53c49557fb1ef285c683b0a81b576c74"
            },
            {
              "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
              "status": "affected",
              "versionType": "git",
              "lessThan": "58dc6035b79c4c73c0cbf9ec9f68a7f117b2b3e6"
            },
            {
              "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cf5f39d2b58f97e0cd1829c4a6aeef17f1607cca"
            },
            {
              "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3a385e0c39efbe34db8edd95900c123113ae3450"
            },
            {
              "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dbc4acbdb3ca8c81441368ad7409b8f77d4de8f6"
            },
            {
              "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d95d342bc0ea82dc79e6362b2f1f997431750e4c"
            },
            {
              "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
              "status": "affected",
              "versionType": "git",
              "lessThan": "14cc5a7e77731497d5bea70f3bb05df7eda982e4"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.0"
            },
            {
              "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": "6.18.51",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}