CVE-2026-46229 drm/amdkfd: Clear VRAM on allocation to prevent stale data exposure
Attackers can read stale VRAM data from prior allocations via KFD compute kernels, potentially exposing sensitive information.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46229?
CVE-2026-46229 is a medium-severity vulnerability in Linux kernel, published on 28 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-46229?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46229?
Apply the vendor's patch.
Is CVE-2026-46229 being exploited?
There is no known exploitation of CVE-2026-46229 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-89024, BELL-CVE-2026-46229, DEBIAN-CVE-2026-46229, GHSA-w77m-3j47-48fr, ROOT-OS-DEBIAN-11-CVE-2026-46229, ROOT-OS-DEBIAN-12-CVE-2026-46229 and 3 more.