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CVE-2026-74453: Linux

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.

  • 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/vc4: Zero the tile state data array before each BIN job The binner BO is a single 16MB buffer split into 512KB slots that are handed out to jobs at submission time and recycled as jobs complete, without ever being cleared. Each slot holds the job's Tile State Data Array (TSDA) at its start, followed by the tile allocation pool. While the tile allocation pool is only walked by the render thread through branches the binner generated during the current job, the TSDA is the PTB's own per-tile bookkeeping and is consumed by the hardware itself. Although the kernel sets the "Auto-initialise Tile State Data Array" flag in the tile binning mode configuration, the PTB demonstrably still acts on stale tile state left by the slot's previous user: the binner ends up creating invalid command streams with invalid primitive streams and branches, which can cause GPU hangs as observed in [1][2]. Zero the TSDA when the job's binning slot is configured. This clears 48 bytes per tile (~24KB for a 1080p frame) in the submission path, and guarantees the PTB never sees another job's tile state. The tile count is only checked for being non-zero today, so the 8-bit fields it comes from can describe a tile state array almost six times larger than the slot it has to live in. Bound it before the slot is handed out, since such size decides how much of the slot is left for the tile alloc pool.

Засегнати продукти

  • Linux Linux: 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 преди c5d8e8e1a8e3b4e464683c5a8a869c16a6382fea; 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 преди d3677372e0275e139f0efd2872c5a524b5d12868; 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 преди c8dea7e7c6098e383e44f21a64d0431da5480e3f; 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 преди f5802be65535f8818af7191159cf8c11f48ab2a2; 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 преди 0e858422df2334165293ea742da9fbb2e51f2739; 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 преди 57667eb7548faaac396c6e39f3b4444dab5b097c; 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 преди a75c8f365e209aa9bb927b0942a7840152d44892; 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 преди 48a570c964d8e37d353381e4195106277e17f5cb
  • Linux Linux: 4.13; преди 4.13; 5.10.265 до 5.10.*; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.151 до 6.6.*; 6.12.103 до 6.12.*; 6.18.44 до 6.18.*; 7.1.8 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74453: Linux | freedomonline.bg