{
  "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-2026-64034",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64034",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T15:39:23.470Z",
    "updatedAt": "2026-10-19T20:28:09.897Z",
    "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": "net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer\n\nIn mana_hwc_rx_event_handler(), resp->response.hwc_msg_id is read from\nDMA-coherent memory and bounds-checked, then mana_hwc_handle_resp()\nre-reads the same field from the same DMA buffer for test_bit() and\npointer arithmetic.\n\nDMA-coherent memory is mapped uncacheable on x86 and is shared,\nunencrypted, in Confidential VMs (SEV-SNP/TDX), so each load goes\ndirectly to host-visible memory. A H/W can modify the value\nbetween the check and the use, bypassing the bounds validation.\n\nFix this by reading hwc_msg_id exactly once using READ_ONCE() into a\nstack-local variable in mana_hwc_rx_event_handler(), and passing the\nvalidated value as a parameter to mana_hwc_handle_resp().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a201c66edf2ebc6cfdc3813a889ba20fecebfae3"
            },
            {
              "version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "70ad2dff8d052a85dfef15715b531f38a29108cf"
            },
            {
              "version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "566f42fb67a7ebfed6650e407e5b72e6b3e83bf7"
            },
            {
              "version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6180a06bbc99fd9114b8db4be6c4d46e40f046ef"
            },
            {
              "version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "09ec063d87c2dd3fa6f3561361a017bd882e9f37"
            },
            {
              "version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3c4db56ccd13dd020fbf43afabaee74a40ec75e4"
            },
            {
              "version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "35f0f0a2536a4d604b4dbad92c85c4a8fdebb870"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.13"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.142",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.92",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.34",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}