netfilter: nf_conntrack_expect: zero at allocation time

{
  "id": "5d489ec1303768e366d6ed61eae17fa119fbb72f27f36cf41fe4895d23a22f21",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-98873",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "netfilter: nf_conntrack_expect: zero at allocation time",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: zero at allocation time There are occasional LLM hints wrt. leaking uninitialized data to userspace via ctnetlink. Just zero at allocation time, expectations are not frequently used these days. Intentionally keeps _init as-is because we could theoretically support re-init, so add the missing exp->dir there.",
    "evidence": "cve:CVE-2026-98873",
    "products": [
      {
        "name": {
          "value": "Linux",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Linux",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98873",
      "aliases": [
        "CVE-2026-98873"
      ],
      "metrics": [],
      "affected": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
              "lessThan": "39cb6ff947c16a576ea68c5f272e634acdcb0085",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
              "lessThan": "90545aa07a183887e9d72ce573c18e08f62e2c91",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
              "lessThan": "9c11d7ea5ff4dbe162e79f00188814ef5483c295",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
              "lessThan": "b7f3ee925aee9f1f547d539bc03c35433c238958",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
              "lessThan": "824397af7bfe14edad374c64253dae0187ca623d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
              "lessThan": "a39ecb856514274c80d0fac4d128dba6b266a8ed",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "076a0ca02644657b13e4af363f487ced2942e9cb",
              "lessThan": "241ccd2fed9051db443aadce248fc0ab30f55e97",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/netfilter/nf_conntrack_expect.c",
            "net/netfilter/nf_conntrack_netlink.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.4"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.4",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/netfilter/nf_conntrack_expect.c",
            "net/netfilter/nf_conntrack_netlink.c"
          ],
          "defaultStatus": "affected"
        }
      ],
      "modified": "2026-10-26T06:55:54.978Z",
      "provider": "cve",
      "references": [
        "https://git.kernel.org/stable/c/39cb6ff947c16a576ea68c5f272e634acdcb0085",
        "https://git.kernel.org/stable/c/90545aa07a183887e9d72ce573c18e08f62e2c91",
        "https://git.kernel.org/stable/c/9c11d7ea5ff4dbe162e79f00188814ef5483c295",
        "https://git.kernel.org/stable/c/b7f3ee925aee9f1f547d539bc03c35433c238958",
        "https://git.kernel.org/stable/c/824397af7bfe14edad374c64253dae0187ca623d",
        "https://git.kernel.org/stable/c/a39ecb856514274c80d0fac4d128dba6b266a8ed",
        "https://git.kernel.org/stable/c/241ccd2fed9051db443aadce248fc0ab30f55e97"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "shortName": "Linux",
          "dateUpdated": "2026-10-26T06:55:54.978Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98873",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-cve",
  "document_id": 263331,
  "published_at": "2026-10-23T11:37:14.109+00:00"
}