{
  "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-2026-64004",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64004",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T14:56:20.895Z",
    "updatedAt": "2026-10-19T20:18:02.698Z",
    "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/iucv: fix locking in .getsockopt",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/iucv: fix locking in .getsockopt\n\nMirror iucv_sock_setsockopt() and wrap the whole switch in\nlock_sock()/release_sock(). The pre-existing SO_MSGLIMIT-only lock\nbecomes redundant and is removed.\n\nAny AF_IUCV HIPER user can potentially crash the kernel by racing\nrecvmsg() with getsockopt(SO_MSGSIZE): the SO_MSGSIZE arm dereferences\niucv->hs_dev->mtu after iucv_sock_close() (called from the racing\nrecvmsg()) has set hs_dev to NULL, producing a NULL pointer dereference\noops.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "51363b8751a673a00ad48eea895266396d53fa52",
              "status": "affected",
              "versionType": "git",
              "lessThan": "884eb247b74d86db97e3a37f0d6fc8e1e83590dd"
            },
            {
              "version": "51363b8751a673a00ad48eea895266396d53fa52",
              "status": "affected",
              "versionType": "git",
              "lessThan": "45bb8de8c95d8899f4b8f61bd9bceb8132af73cb"
            },
            {
              "version": "51363b8751a673a00ad48eea895266396d53fa52",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1fc30bd4e55e2dd622d2d366cecd732c1841bbee"
            },
            {
              "version": "51363b8751a673a00ad48eea895266396d53fa52",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cd691beafea0dd779e69e81ccc26b0ab50efcb5e"
            },
            {
              "version": "51363b8751a673a00ad48eea895266396d53fa52",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6e792b8dd3002bbc4136745928a9605df1a72b8a"
            },
            {
              "version": "51363b8751a673a00ad48eea895266396d53fa52",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9817369243380e287ebe5525411557eaa3aa2a79"
            },
            {
              "version": "51363b8751a673a00ad48eea895266396d53fa52",
              "status": "affected",
              "versionType": "git",
              "lessThan": "69554adc7a6fa04ede3ad7512321d83748e3c920"
            },
            {
              "version": "51363b8751a673a00ad48eea895266396d53fa52",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3589d20a666caf30ad100c960a2de7de390fce88"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.4",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.4"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.93",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.35",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}