{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-80846 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-80846 is a vulnerability in Linux, published on 4 Sep 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-2026-80846 and fix it if it is affected.\n\nWhat it is: CVE-2026-80846 is a vulnerability in Linux, published on 4 Sep 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-2026-80846 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-2026-80846/ (Markdown: https://insights.sbomify.com/CVE-2026-80846/index.md)","id":"CVE-2026-80846","markdown":"https://insights.sbomify.com/CVE-2026-80846/index.md","name":"CVE-2026-80846","record":{"aliases":["AZL-99431","BELL-CVE-2026-80846","DEBIAN-CVE-2026-80846","GHSA-7qhp-m2hr-xxjv","UBUNTU-CVE-2026-80846"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A null pointer dereference in the Linux kernel's XFRM subsystem allows remote attackers to cause a denial of service via crafted ESP-in-TCP packets.","user_interaction":"not_required","vuln_class":"null_dereference"},"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\nxfrm: drop ESP-in-TCP packets with no ingress device\n\nESP-in-TCP receives records through the TCP strparser. handle_esp()\nrestores skb-\u003edev from the saved skb_iif before passing the packet into\nthe XFRM input path.\n\nQueued TCP data can be processed after the original ingress device has\nbeen removed, for example during veth or net namespace teardown. In that\ncase dev_get_by_index_rcu() returns NULL. The XFRM IPv4 and IPv6 input\npaths both expect skb-\u003edev to be valid while building the route lookup,\nso queued ESP-in-TCP data can dereference a NULL device.\n\nDrop the packet if the saved ingress device can no longer be resolved.\nSuch a packet can no longer be routed through the normal XFRM receive\npath, and this preserves the existing behaviour for packets whose ingress\ndevice still exists.","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":"xfrm: drop ESP-in-TCP packets with no ingress device","id":"CVE-2026-80846","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":9,"next":{"headline":"tcp: clamp route advmss to TCP_MIN_MSS","id":"CVE-2026-80847"},"packages":[],"prev":{"headline":"xfrm: avoid lock inversion in nat keepalive work","id":"CVE-2026-80845"},"products":["Linux"],"published":"2026-09-04","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":"2026-10-19","vendors":["Linux"]},"summary":"A null pointer dereference in the Linux kernel's XFRM subsystem allows remote attackers to cause a denial of service via crafted ESP-in-TCP packets.","url":"https://insights.sbomify.com/CVE-2026-80846/"}