{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89803 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-89803 is a high-severity use after free vulnerability in Linux, published on 16 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-2026-89803 and fix it if it is affected.\n\nWhat it is: CVE-2026-89803 is a high-severity use after free vulnerability in Linux, published on 16 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-2026-89803 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-2026-89803/ (Markdown: https://insights.sbomify.com/CVE-2026-89803/index.md)","id":"CVE-2026-89803","markdown":"https://insights.sbomify.com/CVE-2026-89803/index.md","name":"CVE-2026-89803","record":{"aliases":["AZL-101430","BELL-CVE-2026-89803","DEBIAN-CVE-2026-89803","GHSA-6w43-3678-pp8f","UBUNTU-CVE-2026-89803"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"low_privilege","summary":"A use-after-free in the nouveau driver allows attackers to cause a denial of service or potentially execute code via a race condition during channel destruction.","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\ndrm/nouveau: unsubscribe the channel-kill event before the fence context\n\nnouveau_channel_del() tears the fence context down first and only drops\nthe channel-kill subscription later, in the middle of the nvif object\nteardown:\n\n\tif (chan-\u003efence)\n\t\tnouveau_fence(chan-\u003ecli-\u003edrm)-\u003econtext_del(chan);\n\t...\n\tnvif_object_dtor(\u0026chan-\u003evram);\n\tnvif_event_dtor(\u0026chan-\u003ekill);\n\nThe subscribed handler is nouveau_channel_killed(), which calls\nnouveau_channel_kill() and from there nouveau_fence_context_kill() on\nchan-\u003efence. A kill event delivered in that window takes fctx-\u003elock and\nwalks fctx-\u003epending on a fence context that context_del() has already\nfreed.\n\nNothing reaches this below Fermi today, because the subscription is\ngated on FERMI_CHANNEL_GPFIFO and nothing kills a channel there. On\nFermi and newer the window is real but narrow, since a kill has to land\nexactly while the channel is being destroyed. That is reason enough on\nits own, which is why this carries a Fixes: tag. The last patch in this\nseries subscribes Tesla channels as well; nothing kills those today, so\nit does not widen the exposure now, but it is the groundwork for a\nrecovery path that would, and the ordering is better fixed before that\nlands than alongside it.\n\nDrop the subscription before anything it depends on is torn down.","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":"drm/nouveau: unsubscribe the channel-kill event before the fence context","id":"CVE-2026-89803","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"drm/nouveau/dmem: fix mismatched DMA unmap size for large folios","id":"CVE-2026-89804"},"packages":[],"prev":{"headline":"drm/nouveau/uvmm: fix NULL deref unwinding an OP_MAP_SPARSE op","id":"CVE-2026-89802"},"products":["Linux"],"published":"2026-09-16","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":"2026-10-21","vendors":["Linux"]},"summary":"A use-after-free in the nouveau driver allows attackers to cause a denial of service or potentially execute code via a race condition during channel destruction.","url":"https://insights.sbomify.com/CVE-2026-89803/"}