CVE-2026-46229
published 2026-05-28CVE-2026-46229: In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Clear VRAM on allocation to prevent stale data exposure KFD VRAM allocations…
In 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.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 6856e4b65f64eeb3f17148f79b36c1d60c627529 < 1db431380879fd9d28b763a88a0c0431be5be8df | 1db431380879fd9d28b763a88a0c0431be5be8df |
| linux | linux | >= 6856e4b65f64eeb3f17148f79b36c1d60c627529 < 32b153658f017ad2f5bf8aab479e8d16ac95bc3a | 32b153658f017ad2f5bf8aab479e8d16ac95bc3a |
| linux | linux | >= 6856e4b65f64eeb3f17148f79b36c1d60c627529 < 77d0b5d11387071770246fd0185a69fa28e8e109 | 77d0b5d11387071770246fd0185a69fa28e8e109 |
| linux | linux | >= 6856e4b65f64eeb3f17148f79b36c1d60c627529 < 047d44d8d29a6a1a5757256837aa9dd78e3cd0b5 | 047d44d8d29a6a1a5757256837aa9dd78e3cd0b5 |
| linux | linux | >= 6856e4b65f64eeb3f17148f79b36c1d60c627529 < ad52d61d82181dbdb7f05826de38352d5e550cc2 | ad52d61d82181dbdb7f05826de38352d5e550cc2 |
| linux | linux_kernel | — | — |