CVE-2026-74447

Status: UPDATED  |  Advisory ID: CVE-2026-74447

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

drm/amdkfd: fix uint32_t overflow in EOP ring buffer size alignment

eop_ring_buffer_size in struct queue_properties is a u32. In

kfd_queue_acquire_buffers() the expected EOP buffer size is computed as

ALIGN(eop_ring_buffer_size, PAGE_SIZE); ALIGN uses typeof(x), so the

addition is done in 32-bit. A user-supplied size of 0xFFFFF001 wraps to

0, causing kfd_queue_buffer_get() to skip its exact-size check (gated on

size != 0) and accept any BO mapped at the address. On GFX8/GFX9 the MQD

cp_hqd_eop_control is then programmed for an 8KB EOP ring backed by a 4KB

BO, so CP EOP writes can land past the buffer and fault the GPU.

Cast the operand to u64 so the alignment is computed in 64-bit; the size

check in kfd_queue_buffer_get() then rejects the oversized request.

(cherry picked from commit ae443117b742c357bfef3a7bddabf76fcf86e9ef) (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References