CVE-2026-46229
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-05-28
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
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 Software (8)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 6856e4b65f64eeb3f17148f79b36c1d60c627529 < 6bcf59545c84a5105d14d59f40069ef4c033584e |
| Linux | Linux | 6856e4b65f64eeb3f17148f79b36c1d60c627529 < 1db431380879fd9d28b763a88a0c0431be5be8df |
| Linux | Linux | 6856e4b65f64eeb3f17148f79b36c1d60c627529 < 32b153658f017ad2f5bf8aab479e8d16ac95bc3a |
| Linux | Linux | 6856e4b65f64eeb3f17148f79b36c1d60c627529 < 77d0b5d11387071770246fd0185a69fa28e8e109 |
| Linux | Linux | 6856e4b65f64eeb3f17148f79b36c1d60c627529 < 047d44d8d29a6a1a5757256837aa9dd78e3cd0b5 |
| Linux | Linux | 6856e4b65f64eeb3f17148f79b36c1d60c627529 < ad52d61d82181dbdb7f05826de38352d5e550cc2 |
| Linux | Linux | 5.4 |
| linux | linux_kernel | 5.4 – 6.6.140 |