{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89553","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.723Z","datePublished":"2026-09-11T19:44:26.836Z","dateUpdated":"2026-09-14T12:00:55.789Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-14T12:00:55.789Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnouveau/gem: reserve the bo in the info ioctl around the vma lookup\n\nIn the non-uvmm path, there could be a race between the info lookup\nfinding the vma, and the gem close path closing the vma leading\nto a use-after-free.\n\nSpotted with the help of Opus 4.6."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - Reached only via local DRM ioctls on a nouveau render node (/dev/dri/renderD*): DRM_IOCTL_NOUVEAU_GEM_INFO (nouveau_gem_ioctl_info→nouveau_gem_info) racing DRM_IOCTL_GEM_CLOSE (nouveau_gem_object_close). Not reachable from network protocols, adjacent radios, or physical buses.\nAC:L - The attacker controls both sides of the race with threads that GEM_INFO and GEM_CLOSE the same handle, so close kfree()s the nouveau_vma while info still uses it. Skipping UVMM (legacy GEM_NEW) selects the vulnerable path; no victim timing or rare config is required.\nPR:L - NOUVEAU_GEM_INFO and GEM_CLOSE are DRM_RENDER_ALLOW with no DRM_ROOT_ONLY or capability checks. Any unprivileged local user who can open the nouveau render node (typical render/video group or uaccess ACL) can trigger it without init-namespace root.\nUI:N - Exploitation needs only the attacker opening their own DRM client, creating a GEM BO, and racing GEM_INFO against GEM_CLOSE on that handle; no separate victim action is required.\nS:U - The use-after-free corrupts kernel heap state (struct nouveau_vma) inside the host nouveau driver. Impact stays in the same kernel authority; this is not a VM escape or IOMMU/DMA isolation bypass.\nC:H - Use-after-free of struct nouveau_vma lets GEM_INFO read vma->addr after kfree, and concurrent walks of nvbo->vma_list can follow attacker-reused slab objects, enabling kernel memory disclosure as with other UAFs.\nI:H - UAF of the VMA plus concurrent list_del/list_del_init on nvbo->vma_list enables heap spraying and list-pointer corruption, supporting arbitrary kernel writes and control-flow hijack as with other kernel UAFs.\nA:H - Dereferencing a freed nouveau_vma in GEM_INFO or walking a concurrently deleted vma_list causes a kernel oops/panic; the attacker can repeat the race to crash or hang the system."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/nouveau/nouveau_gem.c"],"versions":[{"version":"e758a3111914af7ee4351be86f1ac0efe87ed06e","lessThan":"e05c28bd6043d0fd0bea9c3fc49300a8871a1a81","status":"affected","versionType":"git"},{"version":"e758a3111914af7ee4351be86f1ac0efe87ed06e","lessThan":"208867763843aa82efcbe3b771f1b8e6c7aa820a","status":"affected","versionType":"git"},{"version":"e758a3111914af7ee4351be86f1ac0efe87ed06e","lessThan":"ff110e85837d7ecd83f36078107be240ff5ae409","status":"affected","versionType":"git"},{"version":"e758a3111914af7ee4351be86f1ac0efe87ed06e","lessThan":"e60466011ac3a6b8045e6cc3c2cbb30d58039d2e","status":"affected","versionType":"git"},{"version":"e758a3111914af7ee4351be86f1ac0efe87ed06e","lessThan":"5e17160d41d92823f3379c1982e1369680c5ce4d","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/nouveau/nouveau_gem.c"],"versions":[{"version":"3.1","status":"affected"},{"version":"0","lessThan":"3.1","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.109","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.50","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.4","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/e05c28bd6043d0fd0bea9c3fc49300a8871a1a81"},{"url":"https://git.kernel.org/stable/c/208867763843aa82efcbe3b771f1b8e6c7aa820a"},{"url":"https://git.kernel.org/stable/c/ff110e85837d7ecd83f36078107be240ff5ae409"},{"url":"https://git.kernel.org/stable/c/e60466011ac3a6b8045e6cc3c2cbb30d58039d2e"},{"url":"https://git.kernel.org/stable/c/5e17160d41d92823f3379c1982e1369680c5ce4d"}],"title":"nouveau/gem: reserve the bo in the info ioctl around the vma lookup","x_generator":{"engine":"bippy-1.2.0"}}}}