{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-72442 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-72442 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-2026-72442 and fix it if it is affected.\n\nWhat it is: CVE-2026-72442 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-2026-72442 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-2026-72442/ (Markdown: https://insights.sbomify.com/CVE-2026-72442/index.md)","id":"CVE-2026-72442","markdown":"https://insights.sbomify.com/CVE-2026-72442/index.md","name":"CVE-2026-72442","record":{"aliases":["DEBIAN-CVE-2026-72442","GHSA-wphh-fr34-rp9q","UBUNTU-CVE-2026-72442"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel netfilter","requires_auth":"none","summary":"A missing header pull in Linux kernel netfilter flowtable IP6IP6 tunnel handling can cause a null pointer dereference, leading to a denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: fix and simplify IP6IP6 tunnel handling\n\nFix nf_flow_ip6_tunnel_proto() to use pskb_may_pull() instead of\nskb_header_pointer() to ensure the outer IPv6 header is in the skb\nheadroom, which is required for subsequent packet processing. Move\nctx-\u003eoffset update inside the IPPROTO_IPV6 conditional block since it\nshould only be adjusted when an IP6IP6 tunnel is actually detected.\nSimplify the rx path by removing ipv6_skip_exthdr() and checking\nip6h-\u003enexthdr directly, as the flowtable fast path only handles simple\nIP6IP6 encapsulation without extension headers.\nDrop the tunnel encapsulation limit destination option support from the\ntx path to match, since the rx path no longer handles extension headers.\nRemove the encap_limit parameter from nf_flow_offload_ipv6_forward(),\nnf_flow_tunnel_ip6ip6_push() and nf_flow_tunnel_v6_push(), along with\nthe ipv6_tel_txoption struct and related headroom/MTU adjustments.","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: flowtable: fix and simplify IP6IP6 tunnel handling","id":"CVE-2026-72442","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"ALSA: usb-audio: Kill MIDI 2.0 URBs before freeing endpoints","id":"CVE-2026-72443"},"packages":[],"prev":{"headline":"ieee802154: fix kernel-infoleak in dgram_recvmsg()","id":"CVE-2026-72441"},"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-17","vendors":["Linux"]},"summary":"A missing header pull in Linux kernel netfilter flowtable IP6IP6 tunnel handling can cause a null pointer dereference, leading to a denial of service.","url":"https://insights.sbomify.com/CVE-2026-72442/"}