{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89668 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-89668 is a high-severity use after free vulnerability in Linux, published on 11 Sep 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-2026-89668 and fix it if it is affected.\n\nWhat it is: CVE-2026-89668 is a high-severity use after free vulnerability in Linux, published on 11 Sep 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-2026-89668 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-2026-89668/ (Markdown: https://insights.sbomify.com/CVE-2026-89668/index.md)","id":"CVE-2026-89668","markdown":"https://insights.sbomify.com/CVE-2026-89668/index.md","name":"CVE-2026-89668","record":{"aliases":["BELL-CVE-2026-89668","DEBIAN-CVE-2026-89668","GHSA-9vcc-j8g4-f8ff","UBUNTU-CVE-2026-89668"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel NFS server","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel NFS server allows attackers to execute arbitrary code or cause a denial of service via stale debugfs pointers.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/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\nnfsd: move nfsd_debugfs_init() after nfsd4_init_slabs() in init_nfsd()\n\nnfsd_debugfs_init() runs before nfsd4_init_slabs() in init_nfsd().\nIf the slab allocation fails, the bare \"return retval\" bypasses\nnfsd_debugfs_exit(), leaving orphan debugfs files with stale fops\npointers into the freed module text.\n\nMove nfsd_debugfs_init() to after the slab init succeeds, so the\nearly return has no debugfs state to clean up.\n\nSince debugfs is now the more recently initialized of the two, also\nupdate the unwind paths to match reverse-initialization (LIFO) order:\nrun nfsd_debugfs_exit() before nfsd4_free_slabs() in both the\ninit_nfsd() error path and exit_nfsd(). The nfsd debugfs files only\nreference module-global state and have no dependency on the slab\ncaches, so that reordering is a cleanup with no functional change.","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":"nfsd: move nfsd_debugfs_init() after nfsd4_init_slabs() in init_nfsd()","id":"CVE-2026-89668","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"nfsd: initialize copy-notify stateid before publishing it","id":"CVE-2026-89669"},"packages":[],"prev":{"headline":"nfsd: close shrinker/GC/fsnotify vs per-net shutdown race in filecache","id":"CVE-2026-89667"},"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel NFS server allows attackers to execute arbitrary code or cause a denial of service via stale debugfs pointers.","url":"https://insights.sbomify.com/CVE-2026-89668/"}