pasid reuse

About this tag
The tag 'pasid reuse' on WindowsForum.com covers discussions about Process Address Space ID (PASID) reuse vulnerabilities in GPU drivers, particularly in the Linux kernel's AMDGPU driver. A key topic is CVE-2026-31462, a flaw where immediate PASID reuse after a process exits can cause the GPU to act on stale state due to pending page-fault interrupts. The fix involves switching to a cyclic allocator to prevent immediate reuse, similar to kernel PID management. While the content focuses on Linux, the concept of PASID reuse is relevant to hardware and driver security, which can impact Windows systems using AMD GPUs. The tag explores race conditions, interrupt handling, and memory management in GPU computing environments.

  1. CVE-2026-31462: AMDGPU PASID Reuse Race Fixed with Cyclic Allocator

    CVE-2026-31462 is a small-looking Linux kernel flaw with a very specific failure mode, but it sits in exactly the kind of plumbing that can cause outsized disruption when it misbehaves. The vulnerability in drm/amdgpu is about immediate PASID reuse after a process exits, where the GPU can...
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    • Forum: Security Alerts