{
  "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-2026-64535",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64535",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-27T06:32:34.859Z",
    "updatedAt": "2026-10-19T20:48:39.004Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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 potential UAF when ddgst mismatch",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: Fix potential UAF when ddgst mismatch\n\nShivam Kumar found via vulnerability testing:\nWhen data digest is enabled on an NVMe/TCP connection and a digest\nmismatch occurs on a non-final H2C_DATA PDU during an R2T-based\ndata transfer, the digest error handler in nvmet_tcp_try_recv_ddgst()\ncalls nvmet_req_uninit() — which performs percpu_ref_put() on the\nsubmission queue — but does NOT mark the command as completed. It\ndoes not set cqe->status, does not modify rbytes_done, and does not\nclear any flag. When the subsequent fatal error triggers queue\nteardown, nvmet_tcp_uninit_data_in_cmds() iterates all commands,\nchecks nvmet_tcp_need_data_in() for each one, and finds that the\nalready-uninited command still appears to need data (because\nrbytes_done < transfer_len and cqe->status == 0). It therefore calls\nnvmet_req_uninit() a second time on the same command — a double\npercpu_ref_put against a single percpu_ref_get.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "91edfca6f8b364d60cde3ddefaf7d03ddf35774b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dfb902462bca478f050224ec7a7195aafa7643b1"
            },
            {
              "version": "fda871c0ba5d2eed2cd1c881573168129da70058",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7e558308eba14c8136cb1e615f0c850f76d1fc0a"
            },
            {
              "version": "fda871c0ba5d2eed2cd1c881573168129da70058",
              "status": "affected",
              "versionType": "git",
              "lessThan": "96fe2513df590e74b04253a45089cae75569570e"
            },
            {
              "version": "fda871c0ba5d2eed2cd1c881573168129da70058",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e091ff83d962f9ed00d9bd70443676de9fe98bdc"
            },
            {
              "version": "fda871c0ba5d2eed2cd1c881573168129da70058",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6f9442983a3e4227afd1c83a5251ddbca585ea21"
            },
            {
              "version": "fda871c0ba5d2eed2cd1c881573168129da70058",
              "status": "affected",
              "versionType": "git",
              "lessThan": "088ee46c18d99baef453afd74181dd40ade044ad"
            },
            {
              "version": "fda871c0ba5d2eed2cd1c881573168129da70058",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dbbd07d0a7020b80f6a7028e561908f7b83b3d5a"
            },
            {
              "version": "4b17476d809273617d3317fa0d4ae78aa488d760",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.10.20",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.265"
            },
            {
              "version": "5.11.3",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.12"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.12"
            },
            {
              "version": "5.10.265",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.216",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.97",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.40",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}