Linux Kernel EUVD-2026-28676

Update to patched Linux kernel versions appropriate for your distribution: 5.10.253 or later for 5.10.x series, 5.15.203+ for 5.15.x, 6.1.167+ for 6.1.x, 6.6.130+ for 6.6.x, 6.12.78+ for 6.12.x, 6.18.19+ for 6.18.x, 6.19.9+ for 6.19.x, or upgrade to kernel 7.0+. Upstream fix commit c7c573275ec2 replaced non-atomic assignment with cmpxchg() in amdgpu VM acquire code. Distribution-specific advisories and kernel packages should be consulted for tested updates matching your environment. If immediate patching is not feasible, compensating controls include: limiting local user access to systems with AMD GPUs, restricting process forking capabilities for GPU-utilizing applications through cgroups or AppArmor/SELinux policies (trade-off: may break legitimate multi-process GPU workloads), or temporarily disabling amdgpu driver and falling back to software rendering (significant performance impact, only viable for non-GPU-dependent workloads). Monitor for unusual GPU memory access patterns or crashes in amdgpu driver as potential exploitation indicators. Patch verification: confirm kernel version includes commits listed above via git log inspection or distribution changelog review.