{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-72320 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-72320 is a critical vulnerability in Linux, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-72320 and fix it if it is affected.\n\nWhat it is: CVE-2026-72320 is a critical vulnerability in Linux, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-72320 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-2026-72320/ (Markdown: https://insights.sbomify.com/CVE-2026-72320/index.md)","id":"CVE-2026-72320","markdown":"https://insights.sbomify.com/CVE-2026-72320/index.md","name":"CVE-2026-72320","record":{"aliases":["AZL-96594","BELL-CVE-2026-72320","DEBIAN-CVE-2026-72320","GHSA-xm9x-r949-vc7p","UBUNTU-CVE-2026-72320"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel netfilter","requires_auth":"none","summary":"A logic error in Linux kernel netfilter allows inverted lookups to incorrectly match catchall elements, potentially bypassing firewall rules.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_lookup: fix catchall element handling with inverted lookups\n\nnft_lookup_eval() decides whether a lookup matched (`found`) from the\ndirect set lookup and priv-\u003einvert before falling back to the\ncatchall element used by interval sets (e.g. nft_set_rbtree) for the\nopen-ended default range. Since `found` is never recomputed after\n`ext` is replaced by the catchall lookup, inverted lookups\n(NFT_LOOKUP_F_INV, \"!= @set\") can wrongly match or wrongly skip the\ncatchall element, producing the wrong verdict. Fold the catchall\nlookup into `ext` before computing `found`, matching the order\nalready used by nft_objref_map_eval().","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: nft_lookup: fix catchall element handling with inverted lookups","id":"CVE-2026-72320","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"ipv4: igmp: Fix potential memory leaks in igmp_mod_timer() and igmp_stop_timer()","id":"CVE-2026-72321"},"packages":[],"prev":{"headline":"ipvs: ensure inner headers in ICMP errors are in headroom","id":"CVE-2026-72319"},"products":["Linux"],"published":"2026-08-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Linux"]},"summary":"A logic error in Linux kernel netfilter allows inverted lookups to incorrectly match catchall elements, potentially bypassing firewall rules.","url":"https://insights.sbomify.com/CVE-2026-72320/"}