CVE-2026-68257
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
drm/amdkfd: fix 32-bit overflow in CWSR total size calculation
total_cwsr_size was computed in 32-bit before being used as a BO/SVM
allocation size.
With large ctx_save_restore_area_size and debug_memory_size
multiplied by the XCC count, the product can wrap,
yielding an undersized CWSR save area that firmware later overruns.
Promote total_cwsr_size to u64 and use check_add_overflow()/
check_mul_overflow() in both kfd_queue_acquire_buffers() and
kfd_queue_release_buffers().
(cherry picked from commit 319f7e13423ae3f486b9aea82f9ad2d6af0ee608)
https://git.kernel.org/stable/c/2b0386d4293920e690c0e017708f999b93cc729b
https://git.kernel.org/stable/c/865532d54eb57b660b1cb1b0e1755776ce21b849
https://git.kernel.org/stable/c/abce3276c57e36c955627307469b9f009057a467
https://git.kernel.org/stable/c/b88ffe6593607364a8c06a48c6f29e55437cdf8e