{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-98484 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-98484 is a denial of service vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-98484 and fix it if it is affected.\n\nWhat it is: CVE-2026-98484 is a denial of service vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-98484 in the wild and no public exploit code.\n\nAffected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-98484/ (Markdown: https://insights.sbomify.com/CVE-2026-98484/index.md)","id":"CVE-2026-98484","markdown":"https://insights.sbomify.com/CVE-2026-98484/index.md","name":"CVE-2026-98484","record":{"aliases":["AZL-108665","BELL-CVE-2026-98484","DEBIAN-CVE-2026-98484","GHSA-j4h7-w628-h5g3","UBUNTU-CVE-2026-98484"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel netfilter","requires_auth":"low_privilege","summary":"Expired netfilter catchall elements cause silent rule failures and deletion errors, leading to potential denial of service in Linux kernel networking.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"netfilter: nf_tables: skip expired catchall elements on insert and delete","id":"CVE-2026-98484","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"netfilter: ip6t_rt: fix zero-address non-strict match out-of-bounds read","id":"CVE-2026-98485"},"packages":[],"prev":{"headline":"nfc: fix use-after-free in nfc_get_local_general_bytes","id":"CVE-2026-98483"},"products":["Linux"],"published":"2026-10-18","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Linux"]},"summary":"Expired netfilter catchall elements cause silent rule failures and deletion errors, leading to potential denial of service in Linux kernel networking.","url":"https://insights.sbomify.com/CVE-2026-98484/"}