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CVE-2026-80700: 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/vmwgfx: validate external BO copy bounds for both stride paths vmw_external_bo_copy() trusts caller-supplied offsets, strides, and heights and operates on imported dma-buf vmaps: - The equal-stride memcpy() bound was clamped after subtracting the offsets from dst_size and src_size; an offset larger than the BO size wraps the unsigned subtraction to a huge value and the resulting memcpy() runs off the end of the vmap. dst_stride * height is also a u32 multiplication that can overflow. - The non-equal-stride row-by-row path had no bound at all. The loop touches bytes through offset + (height - 1) * stride + width_in_bytes, with only a WARN_ON(dst_stride < width_in_bytes), and could likewise step past the end of either mapping. The offsets and strides are derived from STDU/SOU plane state, so a configured CRTC submitting a crafted atomic commit on an imported framebuffer can reach this path. Validate the exact row-copy endpoint against each BO's size up front using check_mul_overflow() and check_add_overflow(). Use the bulk memcpy() path only when width_in_bytes covers the whole stride; otherwise copy one row at a time so partial-row updates near the bottom of a framebuffer remain valid. Also reject zero strides and stride < width_in_bytes, both of which the row-by-row path cannot represent safely.

Засегнати продукти

  • Linux Linux: 9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4 преди 4e0f669e2951b742239c6fe847fcc406fe78748d; 50f1199250912568606b3778dc56646c10cb7b04 преди e7b25a6011781ebfdbc458552cae6d4156732771; 50f1199250912568606b3778dc56646c10cb7b04 преди 042ca38779554687fc32b66a28328e0d9a36c58f; 50f1199250912568606b3778dc56646c10cb7b04 преди 5e4a2d15637a906cbd9bc98e0bf969f5f713e344; 50f1199250912568606b3778dc56646c10cb7b04 преди 706c93c5813caabbb0d0a576c017d15aeec2c113; 5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854; 6.6.49 преди 6.6.151; 6.10.8 преди 6.11
  • Linux Linux: 6.11; преди 6.11; 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

  • 28 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-80700: Linux | freedomonline.bg