{
  "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-2026-74666",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-74666",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-22T15:32:38.098Z",
    "updatedAt": "2026-10-16T19:16:08.102Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "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": "packet: synchronize pressure clearing with ring reconfiguration",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\npacket: synchronize pressure clearing with ring reconfiguration\n\npacket_set_ring() updates the RX ring state under sk_receive_queue.lock,\nbut used to publish the tpacket receive mode through po->prot_hook.func\nafter releasing that lock. packet_poll() and packet_recvmsg() can then\nrun the pressure clearing path after the ring has been cleared while\nstill seeing tpacket_rcv, causing __packet_rcv_has_room() to dereference\nstale or NULL ring storage.\n\nMove the existing receive hook assignment into the same\nsk_receive_queue.lock section as the ring state update. Keep the\nassignment otherwise unchanged, including on TX ring reconfiguration, to\navoid adding behavior changes that are not required for the fix.\n\nSerialize packet_recvmsg() pressure clearing with the same queue lock\nonly after PACKET_SOCK_PRESSURE has been observed. If the flag is clear\nand the socket has moved away from tpacket_rcv, packet_set_ring() has\nalready detached the socket and waited for synchronize_net(), so no new\npacket input can set the flag again.\n\npacket_poll() already holds sk_receive_queue.lock, so it uses the new\nunlocked helper directly.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2ccdbaa6d55b0656244ba57c4b56765a0af76c0a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bf3c8e86bc8ad111be3f3136125e255344bcb3da"
            },
            {
              "version": "2ccdbaa6d55b0656244ba57c4b56765a0af76c0a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8cfb2e71926a682f36c4240067d424074dd8f70f"
            },
            {
              "version": "2ccdbaa6d55b0656244ba57c4b56765a0af76c0a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f015c9de92b731814059a343b765c60c0196225c"
            },
            {
              "version": "2ccdbaa6d55b0656244ba57c4b56765a0af76c0a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cf8189b82bb93f219ab740e0346c919ad65ada62"
            },
            {
              "version": "2ccdbaa6d55b0656244ba57c4b56765a0af76c0a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ad740b4990347521f0db260d381f9f74e7b340ba"
            },
            {
              "version": "2ccdbaa6d55b0656244ba57c4b56765a0af76c0a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2c7b5eb87b2b288cdbde825f21d2b83b2f5da747"
            },
            {
              "version": "2ccdbaa6d55b0656244ba57c4b56765a0af76c0a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a08196c3cc105947746ec21309edfbb60275fcdb"
            },
            {
              "version": "2ccdbaa6d55b0656244ba57c4b56765a0af76c0a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1a35da325cac4d5bcad76a2aa943408a6f1d9000"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.2"
            },
            {
              "version": "5.10.267",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.218",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.185",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.152",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.104",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.45",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}