Linux CVE-2026-64051

Local privilege-escalation via kernel memory corruption in the Linux accel/qaic driver (Qualcomm Cloud AI 100 accelerator) lets a user with access to the qaic device trigger a use-after-free by mapping a GEM buffer object (BO) larger than its VMA. The qaic_gem_object_mmap path called remap_pfn_range without bounding it to the VMA size, so an oversized BO mapped pages past the VMA; a later munmap() unmaps only the VMA and leaves stale mappings to freed pages. EPSS is low (0.17%, 6th percentile) with no public exploit and no KEV listing, but the C:H/I:H/A:H impact makes it a valid local escalation primitive on affected hardware.