CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's AMD GPU driver, specifically in the allocation of the GART table, where uninitialized entries can lead to speculative loading of stale data. This flaw can result in the GPU using invalid memory addresses, potentially causing system instability or crashes. Organizations utilizing AMD GPUs on Linux systems should prioritize patching this vulnerability to mitigate the risk of exploitation.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: zero-initialize GART table on allocation GART TLB is flushed after unmapping but not after mapping. Since amdgpu_bo_create_kernel() does not zero-initialize the buffer, when a single PTE is written the TLB may speculatively load other uninitialized entries from the same cacheline. Those garbage entries can appear valid, and a subsequent write to another PTE in the same cacheline may cause the GPU to use a stale garbage PTE from the TLB. Fix this by calling memset_io() to zero-initialize the GART table with gart_pte_flags immediately after allocation. Using AMDGPU_GEM_CREATE_VRAM_CLEARED, SDMA-based clear will not work since SDMA needs GART to be initialized to work. (cherry picked from commit d9af8263b82b6eaa60c5718e0c6631c5037e4b24)
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Other vulnerabilities affecting the same vendor(s)