drm/amdkfd: Clear VRAM on allocation to prevent stale data exposure

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Summary

CVECVE-2026-46229
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 10:16:38 UTC
Updated2026-05-28 13:44:01 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Clear VRAM on allocation to prevent stale data exposure KFD VRAM allocations set AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE but not AMDGPU_GEM_CREATE_VRAM_CLEARED, leaving freshly allocated VRAM with stale data from prior use observable by compute kernels. The GEM ioctl path already sets VRAM_CLEARED for all userspace allocations via amdgpu_gem_create_ioctl() and amdgpu_mode_dumb_create(). The KFD path was missing this flag, allowing stale page table remnants to leak into user buffers. This causes crashes in RCCL P2P transport where non-zero data in ptrExchange/head/tail fields corrupts the protocol handshake.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 1db431380879fd9d28b763a88a0c0431be5be8df git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 32b153658f017ad2f5bf8aab479e8d16ac95bc3a git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 77d0b5d11387071770246fd0185a69fa28e8e109 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 047d44d8d29a6a1a5757256837aa9dd78e3cd0b5 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ad52d61d82181dbdb7f05826de38352d5e550cc2 git Not specified
CNA Linux Linux affected 6.6.140 semver Not specified
CNA Linux Linux affected 6.12.90 semver Not specified
CNA Linux Linux affected 6.18.32 semver Not specified
CNA Linux Linux affected 7.0.9 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-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/32b153658f017ad2f5bf8aab479e8d16ac95bc3a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/77d0b5d11387071770246fd0185a69fa28e8e109 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1db431380879fd9d28b763a88a0c0431be5be8df 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/047d44d8d29a6a1a5757256837aa9dd78e3cd0b5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ad52d61d82181dbdb7f05826de38352d5e550cc2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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