{"id":"CVE-2026-99095","aliases":[],"title":"drm/vc4: drain the hangcheck timer and works on V3D unbind","titleSource":"Linux","descriptionSource":"Linux","products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"d5b1a78a772f1e31a94f8babfa964152ec5e9aa5","status":"affected","lessThan":"17c5fa371de2d5508755cd4cd227cc8e2bb99240","versionType":"git"},{"version":"d5b1a78a772f1e31a94f8babfa964152ec5e9aa5","status":"affected","lessThan":"a046cd60ff3f4a8c8e672b3b18902682c1f91731","versionType":"git"},{"version":"d5b1a78a772f1e31a94f8babfa964152ec5e9aa5","status":"affected","lessThan":"e61465d3e0292daebf4dbb34e0add635e2439569","versionType":"git"},{"version":"d5b1a78a772f1e31a94f8babfa964152ec5e9aa5","status":"affected","lessThan":"ade226dfd28cf2fd1dce143c556d1ee77d953696","versionType":"git"},{"version":"d5b1a78a772f1e31a94f8babfa964152ec5e9aa5","status":"affected","lessThan":"94cf5971b1d04c6382437387c4dc3836cc7a1437","versionType":"git"}],"defaultStatus":"unaffected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99095"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"4.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.5","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99095"}],"remediation":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: drain the hangcheck timer and works on V3D unbind\n\nNothing stops the hangcheck timer that submitted jobs arm, or the\njob_done_work that the render-done interrupt queues, at teardown:\nvc4_irq_disable() cancels only overflow_mem_work, and vc4_gem_destroy()\nruns from the drm-managed release, after vc4_v3d_unbind() has already\nuninstalled the V3D interrupt and cleared vc4->v3d. A timer still armed\nby then reads V3D registers through the NULL vc4->v3d pointer, and the\nlate callbacks run on the vc4_dev embedding them after it has been\nfreed.\n\nDrain them in vc4_v3d_unbind(): shut the timer down and cancel\nreset_work before the interrupt is taken down, because its\nvc4_irq_reset() re-enables it, then flush job_done_work so that\ncompletions queued at teardown still release their jobs.\n\nThis issue was found by an in-house static analysis tool.","severity":"unknown","score":null,"published":"2026-10-26T14:52:02.647Z","modified":"2026-10-26T14:52:02.647Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://git.kernel.org/stable/c/17c5fa371de2d5508755cd4cd227cc8e2bb99240","https://git.kernel.org/stable/c/a046cd60ff3f4a8c8e672b3b18902682c1f91731","https://git.kernel.org/stable/c/e61465d3e0292daebf4dbb34e0add635e2439569","https://git.kernel.org/stable/c/ade226dfd28cf2fd1dce143c556d1ee77d953696","https://git.kernel.org/stable/c/94cf5971b1d04c6382437387c4dc3836cc7a1437"],"sources":[{"name":"CVE","id":"CVE-2026-99095","modified":"2026-10-26T14:52:02.647Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99095"}],"assessments":[],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T05:05:31.777Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}