drm/amdgpu: skip the VMID 0 flush for VRAM

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Summary

CVECVE-2026-97928
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:20 UTC
Updated2026-09-25 11:17:20 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: skip the VMID 0 flush for VRAM Clear-on-release only runs on VRAM, which amdgpu_ttm_map_buffer() reaches via its direct MC address without programming a GART window, yet the wipe still forces a VMID 0 flush. On GFX11 (e.g. Navi33) that spurious SDMA flush can wedge the engine; only flush when a GART window is actually used. v2: Let amdgpu_ttm_map_buffer() return whether the VMID 0 flush is needed, and drive the clear and copy paths from that. (Christian) v3: Make the vm_needs_flush output parameter mandatory instead of allowing NULL. (Christian) (cherry picked from commit a306e406e570b74318ff7d80e5b07b540ca1d3a9)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a68c7eaa7a8ffdec9287ba1561a668d674c20a13 241d7450cf75969cea450eb3e740cb9682f69c2f git Not specified
CNA Linux Linux affected a68c7eaa7a8ffdec9287ba1561a668d674c20a13 87ceb8cba73d0b3c4025ff42495bccd8164acaed git Not specified
CNA Linux Linux affected 6.10 Not specified
CNA Linux Linux unaffected 6.10 semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/241d7450cf75969cea450eb3e740cb9682f69c2f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/87ceb8cba73d0b3c4025ff42495bccd8164acaed 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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