{"id":"CVE-2026-68233","state":"PUBLISHED","title":"drm/vc4: Shut down BO cache timer before teardown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Shut down BO cache timer before teardown\n\nThe BO cache timer callback schedules time_work, and time_work can rearm\nthe timer through vc4_bo_cache_free_old().\n\nvc4_bo_cache_destroy() deletes the timer and then cancels the work, which\ndoes not break that cycle: the work being cancelled can rearm the timer,\nand the timer then queues work again after teardown.\n\nUse timer_shutdown_sync() instead, so the timer cannot be rearmed and the\ncycle ends with cancel_work_sync().","publishedAt":"2026-08-10T12:00:57.580Z","updatedAt":"2026-10-30T12:28:09.594Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"948cd4876dafbfab826384516df19fe813d9f1d1","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"cf55c6f1b62a89bf365c48bf731ccf69340e3a16","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"e9264ee59bd94970b80b7548f693bccf0d4628da","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"a38f2724eb93a78ba250b01e0caf3468df4d3956","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"bac4c1a9af690b8635c6924872075c41d8763ed9","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"6273dd3ffb54ec581855b82ae77331b66028249c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vc4/vc4_bo.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.5","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vc4/vc4_bo.c"]}],"references":["https://git.kernel.org/stable/c/948cd4876dafbfab826384516df19fe813d9f1d1","https://git.kernel.org/stable/c/cf55c6f1b62a89bf365c48bf731ccf69340e3a16","https://git.kernel.org/stable/c/e9264ee59bd94970b80b7548f693bccf0d4628da","https://git.kernel.org/stable/c/a38f2724eb93a78ba250b01e0caf3468df4d3956","https://git.kernel.org/stable/c/bac4c1a9af690b8635c6924872075c41d8763ed9","https://git.kernel.org/stable/c/6273dd3ffb54ec581855b82ae77331b66028249c"],"weaknesses":[],"ingestedAt":"2026-10-30T12:46:06.359Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68233.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68233","state":"PUBLISHED","datePublished":"2026-08-10T12:00:57.580Z","dateUpdated":"2026-10-30T12:28:09.594Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.376Z"},"containers":{"cna":{"title":"drm/vc4: Shut down BO cache timer before teardown","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Shut down BO cache timer before teardown\n\nThe BO cache timer callback schedules time_work, and time_work can rearm\nthe timer through vc4_bo_cache_free_old().\n\nvc4_bo_cache_destroy() deletes the timer and then cancels the work, which\ndoes not break that cycle: the work being cancelled can rearm the timer,\nand the timer then queues work again after teardown.\n\nUse timer_shutdown_sync() instead, so the timer cannot be rearmed and the\ncycle ends with cancel_work_sync()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"948cd4876dafbfab826384516df19fe813d9f1d1","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"cf55c6f1b62a89bf365c48bf731ccf69340e3a16","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"e9264ee59bd94970b80b7548f693bccf0d4628da","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"a38f2724eb93a78ba250b01e0caf3468df4d3956","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"bac4c1a9af690b8635c6924872075c41d8763ed9","versionType":"git"},{"version":"c826a6e1064419f78855463cf29ce9e8b9d25bf4","status":"affected","lessThan":"6273dd3ffb54ec581855b82ae77331b66028249c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vc4/vc4_bo.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.5","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vc4/vc4_bo.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/948cd4876dafbfab826384516df19fe813d9f1d1"},{"url":"https://git.kernel.org/stable/c/cf55c6f1b62a89bf365c48bf731ccf69340e3a16"},{"url":"https://git.kernel.org/stable/c/e9264ee59bd94970b80b7548f693bccf0d4628da"},{"url":"https://git.kernel.org/stable/c/a38f2724eb93a78ba250b01e0caf3468df4d3956"},{"url":"https://git.kernel.org/stable/c/bac4c1a9af690b8635c6924872075c41d8763ed9"},{"url":"https://git.kernel.org/stable/c/6273dd3ffb54ec581855b82ae77331b66028249c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:28:09.594Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}