{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89643 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-89643 is a critical use after free vulnerability in Linux, published on 11 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-2026-89643 and fix it if it is affected.\n\nWhat it is: CVE-2026-89643 is a critical use after free vulnerability in Linux, published on 11 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-2026-89643 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-2026-89643/ (Markdown: https://insights.sbomify.com/CVE-2026-89643/index.md)","id":"CVE-2026-89643","markdown":"https://insights.sbomify.com/CVE-2026-89643/index.md","name":"CVE-2026-89643","record":{"aliases":["AZL-100316","BELL-CVE-2026-89643","DEBIAN-CVE-2026-89643","GHSA-qh9h-fg7c-vgxw","UBUNTU-CVE-2026-89643"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A use-after-free vulnerability in the Linux kernel audit subsystem allows attackers to cause denial of service or potentially execute code via fsnotify rule autoremove.","user_interaction":"not_required","vuln_class":"use_after_free"},"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\naudit: avoid dropping live tree ref on fsnotify rule autoremove\n\naudit_del_rule() is used for both netlink deletion templates and internal\nfsnotify autoremove.  The former passes a parsed template which owns a\ntemporary tree reference; the latter passes the installed entry itself.\n\nThe unconditional audit_put_tree() at the end of audit_del_rule() assumes\nthe template case.  For mixed AUDIT_DIR plus AUDIT_EXE rules, an fsnotify\nautoremove event therefore drops the installed rule's live tree reference.\nRepeating this across rules sharing the same tree can free the tree while\nanother rule still references it, and a later autoremove dereferences the\nfreed pathname while comparing rules.\n\nMove the temporary-tree put to audit_rule_change(), the caller that owns\ndeletion templates.  Keep it in the AUDIT_DEL_RULE cleanup so both\nsuccessful deletion and -ENOENT still release the parser-owned tree.\n\n[PM: dropped unnecessary comment for line length reasons]","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":"audit: avoid dropping live tree ref on fsnotify rule autoremove","id":"CVE-2026-89643","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"btrfs: fix extent map leak in NOCOW direct I/O write","id":"CVE-2026-89644"},"packages":[],"prev":{"headline":"cifs: call pagecache_isize_extended() in cifs_setsize() when extending","id":"CVE-2026-89642"},"products":["Linux"],"published":"2026-09-11","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":"2026-10-19","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel audit subsystem allows attackers to cause denial of service or potentially execute code via fsnotify rule autoremove.","url":"https://insights.sbomify.com/CVE-2026-89643/"}