{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-72423 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-72423 is a high-severity memory corruption vulnerability in Linux, published on 15 Aug 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-2026-72423 and fix it if it is affected.\n\nWhat it is: CVE-2026-72423 is a high-severity memory corruption vulnerability in Linux, published on 15 Aug 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-2026-72423 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-2026-72423/ (Markdown: https://insights.sbomify.com/CVE-2026-72423/index.md)","id":"CVE-2026-72423","markdown":"https://insights.sbomify.com/CVE-2026-72423/index.md","name":"CVE-2026-72423","record":{"aliases":["AZL-96057","BELL-CVE-2026-72423","DEBIAN-CVE-2026-72423","GHSA-x2j2-wxw5-pjr8","UBUNTU-CVE-2026-72423"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A missing bounds check in Linux kernel BPF conntrack kfuncs allows out-of-bounds writes, potentially enabling privilege escalation or code execution.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Guard conntrack opts error writes\n\nThe conntrack lookup and allocation kfuncs take an opts pointer\ntogether with an opts__sz argument. The verifier checks only the memory\nrange described by opts__sz, but the wrappers unconditionally write\nopts-\u003eerror whenever the internal lookup or allocation helper returns an\nerror.\n\nFor an invalid size smaller than the end of opts-\u003eerror, that write can\nland outside the verifier-checked range. Keep returning NULL for invalid\narguments, but only report the error through opts-\u003eerror when the\nsupplied size includes the field.\n\nThis preserves error reporting for the supported 12-byte and 16-byte\nlayouts, and for other invalid sizes that still include opts-\u003eerror.","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":"bpf: Guard conntrack opts error writes","id":"CVE-2026-72423","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"rtc: msc313: fix NULL deref in shared IRQ handler at probe","id":"CVE-2026-72424"},"packages":[],"prev":{"headline":"ksmbd: fix use-after-free of conn-\u003epreauth_info in concurrent SMB2 NEGOTIATE","id":"CVE-2026-72422"},"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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Linux"]},"summary":"A missing bounds check in Linux kernel BPF conntrack kfuncs allows out-of-bounds writes, potentially enabling privilege escalation or code execution.","url":"https://insights.sbomify.com/CVE-2026-72423/"}