drm/amdgpu: zero-initialize GART table on allocation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-53374
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 11:16:38 UTC
Updated2026-07-20 15:16:40 UTC
DescriptionIn 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)

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.001610000 probability, percentile 0.056630000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d38ceaf99ed015f2a0b9af3499791bd3a3daae21 40df11255d71b02e20e70579f1b12b687e396e26 git Not specified
CNA Linux Linux affected d38ceaf99ed015f2a0b9af3499791bd3a3daae21 91fbb5e635c8fb1b49e15c19da06480089ef719f git Not specified
CNA Linux Linux affected d38ceaf99ed015f2a0b9af3499791bd3a3daae21 8ae8b9e74bab94aab1d79f1688129bcc61c8b29a git Not specified
CNA Linux Linux affected d38ceaf99ed015f2a0b9af3499791bd3a3daae21 b17175d0a375b3ed5e81597dac4983fdb46e478d git Not specified
CNA Linux Linux affected d38ceaf99ed015f2a0b9af3499791bd3a3daae21 791941be5da125d9a1b228582bfdc300c05d05b3 git Not specified
CNA Linux Linux affected d38ceaf99ed015f2a0b9af3499791bd3a3daae21 e6c2e6c2e1fa066968a16aca1cb66cd1bdde7741 git Not specified
CNA Linux Linux affected 4.2 Not specified
CNA Linux Linux unaffected 4.2 semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.90 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.32 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.9 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/91fbb5e635c8fb1b49e15c19da06480089ef719f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b17175d0a375b3ed5e81597dac4983fdb46e478d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/791941be5da125d9a1b228582bfdc300c05d05b3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e6c2e6c2e1fa066968a16aca1cb66cd1bdde7741 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/40df11255d71b02e20e70579f1b12b687e396e26 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8ae8b9e74bab94aab1d79f1688129bcc61c8b29a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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