HighFix available

drm/amdgpu: zero-initialize GART table on allocation

Type: advisorySources: OSV

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)

Products: Kernel
Affected versions: Not specified
Fixed versions: 6.1.175, 6.12.90, 6.18.32, 6.6.140, 7.0.9
CVEs: CVE-2026-53374
Confirmed fixed CVEs: Not specified
Updated in this feed: 3 Nov 2026, 23:06 UTC · Revision 1

Source evidence

drm/amdgpu: zero-initialize GART table on allocation

core-osv · Original source

Published 19 Jul 2026, 10:01 UTC

osv:CVE-2026-53374

Kernel

Fixed versions: 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9

Complete source record

{
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  "url": "https://osv.dev/vulnerability/CVE-2026-53374",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/amdgpu: zero-initialize GART table on allocation",
    "summary": "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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      "modified": "2026-10-28T02:30:32.105218099Z",
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      "provider_metadata": {
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  "source_id": "core-osv",
  "document_id": 499218,
  "published_at": "2026-07-19T10:01:58.292+00:00"
}