{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98873", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.377Z", "datePublished": "2026-10-23T11:37:14.109Z", "dateUpdated": "2026-10-26T06:55:54.978Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-26T06:55:54.978Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_expect: zero at allocation time\n\nThere are occasional LLM hints wrt. leaking uninitialized data to\nuserspace via ctnetlink. 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/netfilter/nf_conntrack_expect.c", "net/netfilter/nf_conntrack_netlink.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "39cb6ff947c16a576ea68c5f272e634acdcb0085", "status": "affected", "version": "076a0ca02644657b13e4af363f487ced2942e9cb", "versionType": "git"}, {"lessThan": "90545aa07a183887e9d72ce573c18e08f62e2c91", "status": "affected", "version": "076a0ca02644657b13e4af363f487ced2942e9cb", "versionType": "git"}, {"lessThan": "9c11d7ea5ff4dbe162e79f00188814ef5483c295", "status": "affected", "version": "076a0ca02644657b13e4af363f487ced2942e9cb", "versionType": "git"}, {"lessThan": "b7f3ee925aee9f1f547d539bc03c35433c238958", "status": "affected", "version": "076a0ca02644657b13e4af363f487ced2942e9cb", "versionType": "git"}, {"lessThan": "824397af7bfe14edad374c64253dae0187ca623d", "status": "affected", "version": "076a0ca02644657b13e4af363f487ced2942e9cb", "versionType": "git"}, {"lessThan": "a39ecb856514274c80d0fac4d128dba6b266a8ed", "status": "affected", "version": "076a0ca02644657b13e4af363f487ced2942e9cb", "versionType": "git"}, {"lessThan": "241ccd2fed9051db443aadce248fc0ab30f55e97", "status": "affected", "version": "076a0ca02644657b13e4af363f487ced2942e9cb", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/netfilter/nf_conntrack_expect.c", "net/netfilter/nf_conntrack_netlink.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.4"}, {"lessThan": "3.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_expect: zero at allocation time\n\nThere are occasional LLM hints wrt. leaking uninitialized data to\nuserspace via ctnetlink. Just zero at allocation time,\nexpectations are not frequently used these days.\n\nIntentionally keeps _init as-is because we could theoretically\nsupport re-init, so add the missing exp->dir there."}], "id": "CVE-2026-98873", "lastModified": "2026-10-26T07:17:11.740", "metrics": {}, "published": "2026-10-23T12:18:20.753", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/241ccd2fed9051db443aadce248fc0ab30f55e97"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/39cb6ff947c16a576ea68c5f272e634acdcb0085"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/824397af7bfe14edad374c64253dae0187ca623d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/90545aa07a183887e9d72ce573c18e08f62e2c91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9c11d7ea5ff4dbe162e79f00188814ef5483c295"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a39ecb856514274c80d0fac4d128dba6b266a8ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b7f3ee925aee9f1f547d539bc03c35433c238958"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: netfilter: nf_conntrack_expect: zero at allocation time", "id": "2559571", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559571"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-908", "details": ["A flaw was found in the Linux kernel's Netfilter connection tracking subsystem. Memory allocated for tracking expected network connections was not properly cleared upon allocation. A local user could exploit this vulnerability by querying connection tracking records via the Netlink interface, leading to an information disclosure of uninitialized kernel memory."], "name": "CVE-2026-98873", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98873\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98873\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98873.mbox"], "threat_severity": "Low"}