{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-99005", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-99005", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-10-23T12:20:30.462Z", "updatedAt": "2026-10-23T12:20:30.462Z", "importedAt": "2026-10-24T01:58:41.756Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "drm/i915/gt: Unmask interrupts only when ACTIVE is true", "summary": "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", "versionType": "git", "lessThan": "77abc1837c9651c8f43f7f7f336d10093eeb7745" }, { "version": "3e7abf8141935ded77abeb622480bf4a14241ece", "status": "affected", "versionType": "git", "lessThan": "60f58da15f8c8e39706c564f9251de3626636dce" }, { "version": "3e7abf8141935ded77abeb622480bf4a14241ece", "status": "affected", "versionType": "git", "lessThan": "0b4a0fb98b9ffeac36798bbd369c821605cae70f" }, { "version": "3e7abf8141935ded77abeb622480bf4a14241ece", "status": "affected", "versionType": "git", "lessThan": "49d349c42cf5ebaa878d02699c632c9d883d935f" }, { "version": "3e7abf8141935ded77abeb622480bf4a14241ece", "status": "affected", "versionType": "git", "lessThan": "5346b1cec6afa4f9b4b49a9f84e3cfef95a3f7bb" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.5" }, { "version": "6.6.160", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.113", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.57", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }