{ "affected": [ { "ranges": [ { "events": [ { "introduced": "3e7abf8141935ded77abeb622480bf4a14241ece" }, { "fixed": "c2c2bab5eeb227c0c45d971c58a5f66661e7bb8a" }, { "fixed": "0eb18add8cd84b4d7a6caa71e78cbe5faa912498" }, { "fixed": "8833daaa6f2102b4d527711d09cd72741601242a" }, { "fixed": "77abc1837c9651c8f43f7f7f336d10093eeb7745" }, { "fixed": "60f58da15f8c8e39706c564f9251de3626636dce" }, { "fixed": "0b4a0fb98b9ffeac36798bbd369c821605cae70f" }, { "fixed": "49d349c42cf5ebaa878d02699c632c9d883d935f" }, { "fixed": "5346b1cec6afa4f9b4b49a9f84e3cfef95a3f7bb" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" } ] }, { "package": { "ecosystem": "Linux", "name": "Kernel" }, "ranges": [ { "events": [ { "introduced": "5.5.0" }, { "fixed": "5.10.273" } ], "type": "ECOSYSTEM" }, { "events": [ { "introduced": "5.11.0" }, { "fixed": "5.15.224" } ], "type": "ECOSYSTEM" }, { "events": [ { "introduced": "5.16.0" }, { "fixed": "6.1.191" } ], "type": "ECOSYSTEM" }, { "events": [ { "introduced": "6.2.0" }, { "fixed": "6.6.160" } ], "type": "ECOSYSTEM" }, { "events": [ { "introduced": "6.7.0" }, { "fixed": "6.12.113" } ], "type": "ECOSYSTEM" }, { "events": [ { "introduced": "6.13.0" }, { "fixed": "6.18.57" } ], "type": "ECOSYSTEM" }, { "events": [ { "introduced": "6.19.0" }, { "fixed": "7.2.11" } ], "type": "ECOSYSTEM" } ] } ], "database_specific": { "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99005.json" }, "details": "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-\u003ework, 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 -\u003e intel_engine_pm_put()\n -\u003e wakeref_put()\n\nASYNC1) wakeref_put() callback\n -\u003e __engine_park()\n -\u003e intel_gt_pm_put_async()\n -\u003e intel_gt_pm_put_async_untracked()\n -\u003e intel_wakeref_put_async()\n\nASYNC2) wakeref_put_async() callback\n -\u003e __gt_park()\n -\u003e intel_rps_park()\n -\u003e intel_rps_clear_active() [clear ACTIVE]\n WITH INTERRUPTS:\n -\u003e rps_disable_interrupts()\n -\u003e cancel_work_sync(rps-\u003ework)\n -\u003e rps_reset_interrupts() [rps-\u003epm_iir = 0]\n WITHOUT INTERRUPTS (TIMER mode):\n -\u003e rps_stop_timer()\n -\u003e cancel_work_sync(rps-\u003ework)\n\n2) live_rc6_ctx_wa()\n -\u003e intel_gt_wait_for_idle()\n -\u003e intel_gt_retire_requests_timeout()\n -\u003e dma_fence_wait_timeout()\n -\u003e ops-\u003ewait() [i915_fence_wait()]\n -\u003e i915_request_wait_timeout()\n -\u003e intel_rps_boost()\n -\u003e intel_rps_is_active() [check ACTIVE]\n [OPEN RACE WINDOW]\n -\u003e queue_work(rps-\u003ework)\n -\u003e retire_requests()\n -\u003e i915_request_retire()\n -\u003e 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 \u0026\u0026 !client_boost)\" test (in TIMER mode rps-\u003epm_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() -\u003e\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-\u003einterrupts_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)", "id": "CVE-2026-99005", "modified": "2026-11-01T02:30:55.075861303Z", "published": "2026-10-23T12:20:30.462Z", "references": [ { "type": "WEB", "url": "https://git.kernel.org/stable/c/0b4a0fb98b9ffeac36798bbd369c821605cae70f" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/0eb18add8cd84b4d7a6caa71e78cbe5faa912498" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/49d349c42cf5ebaa878d02699c632c9d883d935f" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/5346b1cec6afa4f9b4b49a9f84e3cfef95a3f7bb" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/60f58da15f8c8e39706c564f9251de3626636dce" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/77abc1837c9651c8f43f7f7f336d10093eeb7745" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/8833daaa6f2102b4d527711d09cd72741601242a" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/c2c2bab5eeb227c0c45d971c58a5f66661e7bb8a" }, { "type": "ADVISORY", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99005.json" }, { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99005" }, { "type": "PACKAGE", "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git" } ], "schema_version": "1.9.2", "summary": "drm/i915/gt: Unmask interrupts only when ACTIVE is true" }