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CVE-2026-31656: Linux, състезание за ресурс

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: drm/i915/gt: fix refcount underflow in intel_engine_park_heartbeat A use-after-free / refcount underflow is possible when the heartbeat worker and intel_engine_park_heartbeat() race to release the same engine->heartbeat.systole request. The heartbeat worker reads engine->heartbeat.systole and calls i915_request_put() on it when the request is complete, but clears the pointer in a separate, non-atomic step. Concurrently, a request retirement on another CPU can drop the engine wakeref to zero, triggering __engine_park() -> intel_engine_park_heartbeat(). If the heartbeat timer is pending at that point, cancel_delayed_work() returns true and intel_engine_park_heartbeat() reads the stale non-NULL systole pointer and calls i915_request_put() on it again, causing a refcount underflow: ``` <4> [487.221889] Workqueue: i915-unordered engine_retire [i915] <4> [487.222640] RIP: 0010:refcount_warn_saturate+0x68/0xb0 ... <4> [487.222707] Call Trace: <4> [487.222711] <TASK> <4> [487.222716] intel_engine_park_heartbeat.part.0+0x6f/0x80 [i915] <4> [487.223115] intel_engine_park_heartbeat+0x25/0x40 [i915] <4> [487.223566] __engine_park+0xb9/0x650 [i915] <4> [487.223973] ____intel_wakeref_put_last+0x2e/0xb0 [i915] <4> [487.224408] __intel_wakeref_put_last+0x72/0x90 [i915] <4> [487.224797] intel_context_exit_engine+0x7c/0x80 [i915] <4> [487.225238] intel_context_exit+0xf1/0x1b0 [i915] <4> [487.225695] i915_request_retire.part.0+0x1b9/0x530 [i915] <4> [487.226178] i915_request_retire+0x1c/0x40 [i915] <4> [487.226625] engine_retire+0x122/0x180 [i915] <4> [487.227037] process_one_work+0x239/0x760 <4> [487.227060] worker_thread+0x200/0x3f0 <4> [487.227068] ? __pfx_worker_thread+0x10/0x10 <4> [487.227075] kthread+0x10d/0x150 <4> [487.227083] ? __pfx_kthread+0x10/0x10 <4> [487.227092] ret_from_fork+0x3d4/0x480 <4> [487.227099] ? __pfx_kthread+0x10/0x10 <4> [487.227107] ret_from_fork_asm+0x1a/0x30 <4> [

Засегнати продукти

  • Linux Linux: 058179e72e0956a2dfe4927db6cbe5fbfb2406aa преди 82034799c6c14b3104668878c3f3e5786f777126; 058179e72e0956a2dfe4927db6cbe5fbfb2406aa преди 70d3e622b10092fc483e28e57b4e8c49d9cc7f68; 058179e72e0956a2dfe4927db6cbe5fbfb2406aa преди 8ce44d28a84fd5e053a88b04872a89d95c0779d4; 058179e72e0956a2dfe4927db6cbe5fbfb2406aa преди ca3f48c3567dd49efdc55b80029ae74659c682ee; 058179e72e0956a2dfe4927db6cbe5fbfb2406aa преди a00e92bf6583d019a4fb2c2df7007e6c9b269ce7; 058179e72e0956a2dfe4927db6cbe5fbfb2406aa преди 2af8b200cae3fdd0e917ecc2753b28bb40c876c1; 058179e72e0956a2dfe4927db6cbe5fbfb2406aa преди 455d98ed527fc94eed90406f90ab2391464ca657; 058179e72e0956a2dfe4927db6cbe5fbfb2406aa преди 4c71fd099513bfa8acab529b626e1f0097b76061
  • Linux Linux: 5.5; преди 5.5; 5.10.258 до 5.10.*; 5.15.203 до 5.15.*; 6.1.169 до 6.1.*; 6.6.135 до 6.6.*; 6.12.82 до 6.12.*; 6.18.23 до 6.18.*; 6.19.13 до 6.19.*; 7.0 до *

Вид слабост

История

  • 24 април 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-31656: Linux, състезание за ресурс | freedomonline.bg