{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31496", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.102Z", "datePublished": "2026-04-22T13:54:18.287Z", "dateUpdated": "2026-04-22T13:54:18.287Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-22T13:54:18.287Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_expect: skip expectations in other netns via proc\n\nSkip expectations that do not reside in this netns.\n\nSimilar to e77e6ff502ea (\"netfilter: conntrack: do not dump other netns's\nconntrack entries via proc\")."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nf_conntrack_expect.c"], "versions": [{"version": "9b03f38d0487f3908696242286d934c9b38f9d2a", "lessThan": "2028405ea6987b4448784e439413202cfe19f43f", "status": "affected", "versionType": "git"}, {"version": "9b03f38d0487f3908696242286d934c9b38f9d2a", "lessThan": "168145c87444619e3e649322bbe7719ecd00d411", "status": "affected", "versionType": "git"}, {"version": "9b03f38d0487f3908696242286d934c9b38f9d2a", "lessThan": "dcfcd95b3ae7683e8ae55c92284b3430ce614bc7", "status": "affected", "versionType": "git"}, {"version": "9b03f38d0487f3908696242286d934c9b38f9d2a", "lessThan": "9ca8c7452493d915f9bbf2f39331e6c583d07a23", "status": "affected", "versionType": "git"}, {"version": "9b03f38d0487f3908696242286d934c9b38f9d2a", "lessThan": "3265ad619987cb551edaf797ed056d80ac450225", "status": "affected", "versionType": "git"}, {"version": "9b03f38d0487f3908696242286d934c9b38f9d2a", "lessThan": "3db5647984de03d9cae0dcddb509b058351f0ee4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nf_conntrack_expect.c"], "versions": [{"version": "2.6.28", "status": "affected"}, {"version": "0", "lessThan": "2.6.28", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.131", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.80", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.11", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.28", "versionEndExcluding": "6.1.168"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.28", "versionEndExcluding": "6.6.131"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.28", "versionEndExcluding": "6.12.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.28", "versionEndExcluding": "6.18.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.28", "versionEndExcluding": "6.19.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.28", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2028405ea6987b4448784e439413202cfe19f43f"}, {"url": "https://git.kernel.org/stable/c/168145c87444619e3e649322bbe7719ecd00d411"}, {"url": "https://git.kernel.org/stable/c/dcfcd95b3ae7683e8ae55c92284b3430ce614bc7"}, {"url": "https://git.kernel.org/stable/c/9ca8c7452493d915f9bbf2f39331e6c583d07a23"}, {"url": "https://git.kernel.org/stable/c/3265ad619987cb551edaf797ed056d80ac450225"}, {"url": "https://git.kernel.org/stable/c/3db5647984de03d9cae0dcddb509b058351f0ee4"}], "title": "netfilter: nf_conntrack_expect: skip expectations in other netns via proc", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_expect: skip expectations in other netns via proc\n\nSkip expectations that do not reside in this netns.\n\nSimilar to e77e6ff502ea (\"netfilter: conntrack: do not dump other netns's\nconntrack entries via proc\")."}], "id": "CVE-2026-31496", "lastModified": "2026-04-23T16:17:41.280", "metrics": {}, "published": "2026-04-22T14:16:47.693", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/168145c87444619e3e649322bbe7719ecd00d411"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2028405ea6987b4448784e439413202cfe19f43f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3265ad619987cb551edaf797ed056d80ac450225"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3db5647984de03d9cae0dcddb509b058351f0ee4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9ca8c7452493d915f9bbf2f39331e6c583d07a23"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dcfcd95b3ae7683e8ae55c92284b3430ce614bc7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: netfilter: nf_conntrack_expect: skip expectations in other netns via proc", "id": "2460701", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460701"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-653", "details": ["A flaw was found in the Linux kernel's netfilter subsystem. This vulnerability allows a local user to potentially access or view network connection tracking expectations (`nf_conntrack_expect`) from other network namespaces (`netns`) via the `/proc` filesystem. This could lead to information disclosure or a bypass of network isolation, compromising the intended separation between different network environments."], "name": "CVE-2026-31496", "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"}], "public_date": "2026-04-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31496\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31496\nhttps://lore.kernel.org/linux-cve-announce/2026042203-CVE-2026-31496-e130@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9b03f38d0487f3908696242286d934c9b38f9d2a,2028405ea6987b4448784e439413202cfe19f43f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9b03f38d0487f3908696242286d934c9b38f9d2a,168145c87444619e3e649322bbe7719ecd00d411)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9b03f38d0487f3908696242286d934c9b38f9d2a,dcfcd95b3ae7683e8ae55c92284b3430ce614bc7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9b03f38d0487f3908696242286d934c9b38f9d2a,9ca8c7452493d915f9bbf2f39331e6c583d07a23)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9b03f38d0487f3908696242286d934c9b38f9d2a,3265ad619987cb551edaf797ed056d80ac450225)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9b03f38d0487f3908696242286d934c9b38f9d2a,3db5647984de03d9cae0dcddb509b058351f0ee4)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.28"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.6.28)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.168,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.131,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.80,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.21,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.11,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-04-22T17:30:22.456260+00:00", "updated": "2026-04-22T17:30:22.456324+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}