CVE-2026-98484

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98484", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.352Z", "datePublished": "2026-10-18T15:15:58.118Z", "dateUpdated": "2026-10-30T12:38:15.332Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:38:15.332Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: skip expired catchall elements on insert and delete\n\nnft_setelem_catchall_insert() looks up duplicates with\nnft_set_elem_active() only, while nft_set_catchall_lookup() and the\ndump path additionally skip expired elements.\n\nOnce a catchall element with a timeout expires, this predicate drift\nmakes it invisible to userspace dumps, yet it still blocks\nre-insertion: with NLM_F_EXCL the request fails with -EEXIST, and\nwithout it the request reports success but silently inserts nothing.\nThe stale entry only goes away when the (user-tunable) gc interval\nelapses, so the catchall rule may silently stop matching for an\narbitrarily long time after its first expiration.\n\nThe delete path shows the same drift: nft_setelem_catchall_deactivate()\npicks the first active-next entry in the catchall list, so with an\nexpired entry still pending GC it retires the stale entry instead of\nthe fresh one, and it deactivates an element that userspace no longer\nsees instead of failing with -ENOENT.\n\nAlign both walks with the lookup and dump predicates: only an element\nthat is active and not expired counts as a duplicate or delete\ncandidate, using the per-netns timestamp taken at transaction start,\nin line with the set backend .insert/.deactivate and catchall GC sync\npaths."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nf_tables_api.c"], "versions": [{"version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "lessThan": "2462ff0861f0dd5b2abdc3e95c3360d8566ab081", "status": "affected", "versionType": "git"}, {"version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "lessThan": "f347d71d0d1a2157d8ecadbe1fba69cff32fce98", "status": "affected", "versionType": "git"}, {"version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "lessThan": "5e20b39aa7844769a7a782484bc1a809ffbc513e", "status": "affected", "versionType": "git"}, {"version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "lessThan": "2f07da3881525f7cbfed1ced2796c71a201505b9", "status": "affected", "versionType": "git"}, {"version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "lessThan": "12cf803edfffef96f6415f0b5dbc7ec88842ea0f", "status": "affected", "versionType": "git"}, {"version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "lessThan": "4fb8b1ccc475651e480e509de126bb9ce7f3cff9", "status": "affected", "versionType": "git"}, {"version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "lessThan": "70194dc37670bd08e44b471389861cc01bd3a3c9", "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_tables_api.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.13", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2462ff0861f0dd5b2abdc3e95c3360d8566ab081"}, {"url": "https://git.kernel.org/stable/c/f347d71d0d1a2157d8ecadbe1fba69cff32fce98"}, {"url": "https://git.kernel.org/stable/c/5e20b39aa7844769a7a782484bc1a809ffbc513e"}, {"url": "https://git.kernel.org/stable/c/2f07da3881525f7cbfed1ced2796c71a201505b9"}, {"url": "https://git.kernel.org/stable/c/12cf803edfffef96f6415f0b5dbc7ec88842ea0f"}, {"url": "https://git.kernel.org/stable/c/4fb8b1ccc475651e480e509de126bb9ce7f3cff9"}, {"url": "https://git.kernel.org/stable/c/70194dc37670bd08e44b471389861cc01bd3a3c9"}], "title": "netfilter: nf_tables: skip expired catchall elements on insert and delete", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/netfilter/nf_tables_api.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2462ff0861f0dd5b2abdc3e95c3360d8566ab081", "status": "affected", "version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "versionType": "git"}, {"lessThan": "f347d71d0d1a2157d8ecadbe1fba69cff32fce98", "status": "affected", "version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "versionType": "git"}, {"lessThan": "5e20b39aa7844769a7a782484bc1a809ffbc513e", "status": "affected", "version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "versionType": "git"}, {"lessThan": "2f07da3881525f7cbfed1ced2796c71a201505b9", "status": "affected", "version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "versionType": "git"}, {"lessThan": "12cf803edfffef96f6415f0b5dbc7ec88842ea0f", "status": "affected", "version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "versionType": "git"}, {"lessThan": "4fb8b1ccc475651e480e509de126bb9ce7f3cff9", "status": "affected", "version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "versionType": "git"}, {"lessThan": "70194dc37670bd08e44b471389861cc01bd3a3c9", "status": "affected", "version": "aaa31047a6d25da0fa101da1ed544e1247949b40", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/netfilter/nf_tables_api.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"lessThan": "5.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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_tables: skip expired catchall elements on insert and delete\n\nnft_setelem_catchall_insert() looks up duplicates with\nnft_set_elem_active() only, while nft_set_catchall_lookup() and the\ndump path additionally skip expired elements.\n\nOnce a catchall element with a timeout expires, this predicate drift\nmakes it invisible to userspace dumps, yet it still blocks\nre-insertion: with NLM_F_EXCL the request fails with -EEXIST, and\nwithout it the request reports success but silently inserts nothing.\nThe stale entry only goes away when the (user-tunable) gc interval\nelapses, so the catchall rule may silently stop matching for an\narbitrarily long time after its first expiration.\n\nThe delete path shows the same drift: nft_setelem_catchall_deactivate()\npicks the first active-next entry in the catchall list, so with an\nexpired entry still pending GC it retires the stale entry instead of\nthe fresh one, and it deactivates an element that userspace no longer\nsees instead of failing with -ENOENT.\n\nAlign both walks with the lookup and dump predicates: only an element\nthat is active and not expired counts as a duplicate or delete\ncandidate, using the per-netns timestamp taken at transaction start,\nin line with the set backend .insert/.deactivate and catchall GC sync\npaths."}], "id": "CVE-2026-98484", "lastModified": "2026-10-30T13:21:14.680", "metrics": {}, "published": "2026-10-18T16:16:59.077", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/12cf803edfffef96f6415f0b5dbc7ec88842ea0f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2462ff0861f0dd5b2abdc3e95c3360d8566ab081"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2f07da3881525f7cbfed1ced2796c71a201505b9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4fb8b1ccc475651e480e509de126bb9ce7f3cff9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5e20b39aa7844769a7a782484bc1a809ffbc513e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/70194dc37670bd08e44b471389861cc01bd3a3c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f347d71d0d1a2157d8ecadbe1fba69cff32fce98"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: netfilter: nf_tables: skip expired catchall elements on insert and delete", "id": "2554907", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554907"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L", "status": "draft"}, "cwe": "CWE-1025", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: nf_tables: skip expired catchall elements on insert and delete\nnft_setelem_catchall_insert() looks up duplicates with\nnft_set_elem_active() only, while nft_set_catchall_lookup() and the\ndump path additionally skip expired elements.\nOnce a catchall element with a timeout expires, this predicate drift\nmakes it invisible to userspace dumps, yet it still blocks\nre-insertion: with NLM_F_EXCL the request fails with -EEXIST, and\nwithout it the request reports success but silently inserts nothing.\nThe stale entry only goes away when the (user-tunable) gc interval\nelapses, so the catchall rule may silently stop matching for an\narbitrarily long time after its first expiration.\nThe delete path shows the same drift: nft_setelem_catchall_deactivate()\npicks the first active-next entry in the catchall list, so with an\nexpired entry still pending GC it retires the stale entry instead of\nthe fresh one, and it deactivates an element that userspace no longer\nsees instead of failing with -ENOENT.\nAlign both walks with the lookup and dump predicates: only an element\nthat is active and not expired counts as a duplicate or delete\ncandidate, using the per-netns timestamp taken at transaction start,\nin line with the set backend .insert/.deactivate and catchall GC sync\npaths.", "A flaw was found in the Linux kernel's netfilter subsystem. A local user with network administration privileges can exploit this issue to cause a security bypass or Denial of Service (DoS). Due to improper handling of expired catchall set elements during insertion and deletion operations, stale entries are not properly ignored before background cleanup runs. This flaw can block the addition of new firewall rules or deactivate valid rules, causing network traffic to bypass intended filtering policies."], "name": "CVE-2026-98484", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "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": "Not affected", "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": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98484\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98484\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98484.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aaa31047a6d25da0fa101da1ed544e1247949b40,2f07da3881525f7cbfed1ced2796c71a201505b9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aaa31047a6d25da0fa101da1ed544e1247949b40,12cf803edfffef96f6415f0b5dbc7ec88842ea0f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aaa31047a6d25da0fa101da1ed544e1247949b40,4fb8b1ccc475651e480e509de126bb9ce7f3cff9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aaa31047a6d25da0fa101da1ed544e1247949b40,70194dc37670bd08e44b471389861cc01bd3a3c9)"}}], "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": "generic", "value": "5.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc5,*]"}}], "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": "2026-10-18T17:15:14.547668+00:00", "updated": "2026-10-23T07:30:09.351821+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}