{"id":"CVE-2026-99005","state":"PUBLISHED","title":"drm/i915/gt: Unmask interrupts only when ACTIVE is true","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/gt: Unmask interrupts only when ACTIVE is true\n\nThere is a small race window between intel_rps_boost() reading\na stale ACTIVE state and queuing rps->work, where ACTIVE may be\nchanged via asynchronous calls triggered by wakeref drop.\nThis means that rps_work() could be triggered after the GT has\nbeen parked, so unmasking RPS PM interrupts would happen without\nholding PM wakelock. This sequence of events may be observed\nduring live_rc6_ctx_wa() selftest:\n\n1) live_rc6_ctx_wa()\n   -> intel_engine_pm_put()\n      -> wakeref_put()\n\nASYNC1) wakeref_put() callback\n          -> __engine_park()\n             -> intel_gt_pm_put_async()\n                -> intel_gt_pm_put_async_untracked()\n                   -> intel_wakeref_put_async()\n\nASYNC2) wakeref_put_async() callback\n          -> __gt_park()\n             -> intel_rps_park()\n                -> intel_rps_clear_active() [clear ACTIVE]\n                WITH INTERRUPTS:\n                -> rps_disable_interrupts()\n                   -> cancel_work_sync(rps->work)\n                   -> rps_reset_interrupts() [rps->pm_iir = 0]\n                WITHOUT INTERRUPTS (TIMER mode):\n                -> rps_stop_timer()\n                   -> cancel_work_sync(rps->work)\n\n2) live_rc6_ctx_wa()\n   -> intel_gt_wait_for_idle()\n      -> intel_gt_retire_requests_timeout()\n         -> dma_fence_wait_timeout()\n            -> ops->wait() [i915_fence_wait()]\n               -> i915_request_wait_timeout()\n                  -> intel_rps_boost()\n                     -> intel_rps_is_active() [check ACTIVE]\n                        [OPEN RACE WINDOW]\n                     -> queue_work(rps->work)\n         -> retire_requests()\n            -> i915_request_retire()\n               -> intel_rps_dec_waiters() [from 1 to 0]\n\nIf ASYNC1 and ASYNC2 would execute during [OPEN RACE WINDOW],\nthen:\n\n3) rps_work() executes from the workqueue and may satisfy\n   \"(!pm_iir && !client_boost)\" test (in TIMER mode rps->pm_iir\n   is zeroed by an earlier rps_work() call or never gets a new\n   value after previous intel_rps_unpark() event), so it jumps\n   to \"out\" label, bypassing intel_rps_is_active() guard and\n   executes gen6_gt_pm_unmask_irq();\n\n4) GT is parked and runtime PM wakelock is dropped, so only\n   a raw reference in __gt_park() ->\n   intel_display_power_put_async() remains for 100ms, then the\n   MMIO write in gen6_gt_pm_unmask_irq() detects missing\n   wakelock via assert_rpm_wakelock_held() and emits\n   \"RPM wakelock ref not held during HW access\" tainting kernel.\n\nCommit 3e7abf814193 (\"drm/i915: Extract GT render power state management\")\ndropped the \"if (rps->interrupts_enabled)\" guard that\ngen6_pm_rps_work() had around this unmask in i915_irq.c.\nINTEL_RPS_ACTIVE brackets the same window, since it is set in\nintel_rps_unpark() before rps_enable_interrupts() and\nrps_start_timer() and cleared in intel_rps_park() before\nrps_stop_timer() and rps_disable_interrupts().\n\nSkip unmasking when RPS is no longer active (reaching unmask\noperation is independent of INTERRUPT mode). This does not\nprevent RPS operation from resuming on the next unpark.\nIn interrupt mode, intel_rps_unpark() calls\nrps_enable_interrupts(), which enables and unmasks the PM\ninterrupts. In timer mode, it calls rps_start_timer(),\nrestarting periodic engine-busyness evaluation. The timer\ngenerates software RPS events and queues rps_work() directly,\nindependently of PM interrupt delivery. Neither mode requires\nthe late worker to unmask interrupts while the GT is parked\n\n(cherry picked from commit ca4a6deadad15b91ee083afe445fa6bdbfb68206)","publishedAt":"2026-10-23T12:20:30.462Z","updatedAt":"2026-10-30T12:40:49.182Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"c2c2bab5eeb227c0c45d971c58a5f66661e7bb8a","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"0eb18add8cd84b4d7a6caa71e78cbe5faa912498","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"8833daaa6f2102b4d527711d09cd72741601242a","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"77abc1837c9651c8f43f7f7f336d10093eeb7745","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"60f58da15f8c8e39706c564f9251de3626636dce","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"0b4a0fb98b9ffeac36798bbd369c821605cae70f","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"49d349c42cf5ebaa878d02699c632c9d883d935f","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"5346b1cec6afa4f9b4b49a9f84e3cfef95a3f7bb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/i915/gt/intel_rps.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","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":"6.12.113","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"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/i915/gt/intel_rps.c"]}],"references":["https://git.kernel.org/stable/c/c2c2bab5eeb227c0c45d971c58a5f66661e7bb8a","https://git.kernel.org/stable/c/0eb18add8cd84b4d7a6caa71e78cbe5faa912498","https://git.kernel.org/stable/c/8833daaa6f2102b4d527711d09cd72741601242a","https://git.kernel.org/stable/c/77abc1837c9651c8f43f7f7f336d10093eeb7745","https://git.kernel.org/stable/c/60f58da15f8c8e39706c564f9251de3626636dce","https://git.kernel.org/stable/c/0b4a0fb98b9ffeac36798bbd369c821605cae70f","https://git.kernel.org/stable/c/49d349c42cf5ebaa878d02699c632c9d883d935f","https://git.kernel.org/stable/c/5346b1cec6afa4f9b4b49a9f84e3cfef95a3f7bb"],"weaknesses":[],"ingestedAt":"2026-10-30T13:00:06.648Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/99xxx/CVE-2026-99005.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99005","state":"PUBLISHED","datePublished":"2026-10-23T12:20:30.462Z","dateUpdated":"2026-10-30T12:40:49.182Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.385Z"},"containers":{"cna":{"title":"drm/i915/gt: Unmask interrupts only when ACTIVE is true","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/gt: Unmask interrupts only when ACTIVE is true\n\nThere is a small race window between intel_rps_boost() reading\na stale ACTIVE state and queuing rps->work, where ACTIVE may be\nchanged via asynchronous calls triggered by wakeref drop.\nThis means that rps_work() could be triggered after the GT has\nbeen parked, so unmasking RPS PM interrupts would happen without\nholding PM wakelock. This sequence of events may be observed\nduring live_rc6_ctx_wa() selftest:\n\n1) live_rc6_ctx_wa()\n   -> intel_engine_pm_put()\n      -> wakeref_put()\n\nASYNC1) wakeref_put() callback\n          -> __engine_park()\n             -> intel_gt_pm_put_async()\n                -> intel_gt_pm_put_async_untracked()\n                   -> intel_wakeref_put_async()\n\nASYNC2) wakeref_put_async() callback\n          -> __gt_park()\n             -> intel_rps_park()\n                -> intel_rps_clear_active() [clear ACTIVE]\n                WITH INTERRUPTS:\n                -> rps_disable_interrupts()\n                   -> cancel_work_sync(rps->work)\n                   -> rps_reset_interrupts() [rps->pm_iir = 0]\n                WITHOUT INTERRUPTS (TIMER mode):\n                -> rps_stop_timer()\n                   -> cancel_work_sync(rps->work)\n\n2) live_rc6_ctx_wa()\n   -> intel_gt_wait_for_idle()\n      -> intel_gt_retire_requests_timeout()\n         -> dma_fence_wait_timeout()\n            -> ops->wait() [i915_fence_wait()]\n               -> i915_request_wait_timeout()\n                  -> intel_rps_boost()\n                     -> intel_rps_is_active() [check ACTIVE]\n                        [OPEN RACE WINDOW]\n                     -> queue_work(rps->work)\n         -> retire_requests()\n            -> i915_request_retire()\n               -> intel_rps_dec_waiters() [from 1 to 0]\n\nIf ASYNC1 and ASYNC2 would execute during [OPEN RACE WINDOW],\nthen:\n\n3) rps_work() executes from the workqueue and may satisfy\n   \"(!pm_iir && !client_boost)\" test (in TIMER mode rps->pm_iir\n   is zeroed by an earlier rps_work() call or never gets a new\n   value after previous intel_rps_unpark() event), so it jumps\n   to \"out\" label, bypassing intel_rps_is_active() guard and\n   executes gen6_gt_pm_unmask_irq();\n\n4) GT is parked and runtime PM wakelock is dropped, so only\n   a raw reference in __gt_park() ->\n   intel_display_power_put_async() remains for 100ms, then the\n   MMIO write in gen6_gt_pm_unmask_irq() detects missing\n   wakelock via assert_rpm_wakelock_held() and emits\n   \"RPM wakelock ref not held during HW access\" tainting kernel.\n\nCommit 3e7abf814193 (\"drm/i915: Extract GT render power state management\")\ndropped the \"if (rps->interrupts_enabled)\" guard that\ngen6_pm_rps_work() had around this unmask in i915_irq.c.\nINTEL_RPS_ACTIVE brackets the same window, since it is set in\nintel_rps_unpark() before rps_enable_interrupts() and\nrps_start_timer() and cleared in intel_rps_park() before\nrps_stop_timer() and rps_disable_interrupts().\n\nSkip unmasking when RPS is no longer active (reaching unmask\noperation is independent of INTERRUPT mode). This does not\nprevent RPS operation from resuming on the next unpark.\nIn interrupt mode, intel_rps_unpark() calls\nrps_enable_interrupts(), which enables and unmasks the PM\ninterrupts. In timer mode, it calls rps_start_timer(),\nrestarting periodic engine-busyness evaluation. The timer\ngenerates software RPS events and queues rps_work() directly,\nindependently of PM interrupt delivery. Neither mode requires\nthe late worker to unmask interrupts while the GT is parked\n\n(cherry picked from commit ca4a6deadad15b91ee083afe445fa6bdbfb68206)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"c2c2bab5eeb227c0c45d971c58a5f66661e7bb8a","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"0eb18add8cd84b4d7a6caa71e78cbe5faa912498","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"8833daaa6f2102b4d527711d09cd72741601242a","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"77abc1837c9651c8f43f7f7f336d10093eeb7745","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"60f58da15f8c8e39706c564f9251de3626636dce","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"0b4a0fb98b9ffeac36798bbd369c821605cae70f","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"49d349c42cf5ebaa878d02699c632c9d883d935f","versionType":"git"},{"version":"3e7abf8141935ded77abeb622480bf4a14241ece","status":"affected","lessThan":"5346b1cec6afa4f9b4b49a9f84e3cfef95a3f7bb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/i915/gt/intel_rps.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","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":"6.12.113","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"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/i915/gt/intel_rps.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c2c2bab5eeb227c0c45d971c58a5f66661e7bb8a"},{"url":"https://git.kernel.org/stable/c/0eb18add8cd84b4d7a6caa71e78cbe5faa912498"},{"url":"https://git.kernel.org/stable/c/8833daaa6f2102b4d527711d09cd72741601242a"},{"url":"https://git.kernel.org/stable/c/77abc1837c9651c8f43f7f7f336d10093eeb7745"},{"url":"https://git.kernel.org/stable/c/60f58da15f8c8e39706c564f9251de3626636dce"},{"url":"https://git.kernel.org/stable/c/0b4a0fb98b9ffeac36798bbd369c821605cae70f"},{"url":"https://git.kernel.org/stable/c/49d349c42cf5ebaa878d02699c632c9d883d935f"},{"url":"https://git.kernel.org/stable/c/5346b1cec6afa4f9b4b49a9f84e3cfef95a3f7bb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:40:49.182Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.2.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}