{
  "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-2026-74657",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-74657",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-22T15:32:31.458Z",
    "updatedAt": "2026-08-27T12:39:57.259Z",
    "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": "ipv4: Fix fib_nlmsg_size() for RTA_VIA nexthops",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: Fix fib_nlmsg_size() for RTA_VIA nexthops\n\nfib_nlmsg_size() still estimates nexthop space as if every gateway is\nencoded as an IPv4 RTA_GATEWAY attribute. IPv4 routes can also carry an\nIPv6 gateway, which fib_nexthop_info() dumps as RTA_VIA.\n\nAs a result, route notifications can allocate an skb that is too small.\nfib_dump_info() then fails with -EMSGSIZE and rtmsg_fib() hits the\nWARN_ON() that marks such failures as a fib_nlmsg_size() bug. With\npanic_on_warn set, this becomes a kernel panic.\n\nMirror the actual nexthop dump layout in fib_nlmsg_size(): account for\nIPv6 nexthop gateways dumped as RTA_VIA, for the no-header rtnexthop\nlayout used inside RTA_MULTIPATH, and for RTA_FLOW only when it is\nactually present.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "d15662682db232da77136cd348f4c9df312ca6f9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "57195f0ab5cfbb5ee0864e5aff15ceb48f5a5e28"
            },
            {
              "version": "d15662682db232da77136cd348f4c9df312ca6f9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0f0ca602941d0a81ae9514943ca06c55159c6385"
            },
            {
              "version": "d15662682db232da77136cd348f4c9df312ca6f9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5307a53599fa762c06e475ee4a375252074fd324"
            },
            {
              "version": "d15662682db232da77136cd348f4c9df312ca6f9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7f80ad373ce4a7af5367ff273cea0f16e91387f3"
            },
            {
              "version": "d15662682db232da77136cd348f4c9df312ca6f9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4a5dfbae5179f6574695012a980476254df2d295"
            },
            {
              "version": "d15662682db232da77136cd348f4c9df312ca6f9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a59edda6eda1252340354322d8ab318b2e9052fb"
            },
            {
              "version": "d15662682db232da77136cd348f4c9df312ca6f9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9b22f13524fa0de0d963bbd3002df6c28bae3395"
            },
            {
              "version": "d15662682db232da77136cd348f4c9df312ca6f9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4ff9548d84945d2cbf9e4c207288063a200ea397"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.2"
            },
            {
              "version": "5.10.267",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.216",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.183",
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}