CVE-2026-53143 drm/amdkfd: Fix buffer overflow in SDMA queue checkpoint/restore on GFX11
A buffer overflow in the AMD GPU kernel driver allows attackers to leak memory or corrupt adjacent kernel data during checkpoint/restore operations.
- 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-2026-53143?
CVE-2026-53143 is a high-severity memory corruption vulnerability in Linux kernel, published on 25 Jun 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: Fix buffer overflow in SDMA queue checkpoint/restore on GFX11
The v11 MQD manager incorrectly assigned the CP-compute variants of checkpoint_mqd/restore_mqd for KFD_MQD_TYPE_SDMA queues. These functions use sizeof(struct v11_compute_mqd) (2048 bytes) instead of sizeof(struct v11_sdma_mqd) (512 bytes), causing a 1536-byte overflow.
During CRIU checkpoint of an SDMA queue on Navi3x: - checkpoint_mqd() reads 2048 bytes from a 512-byte SDMA MQD buffer, leaking 1536 bytes of adjacent GTT memory to userspace
During CRIU restore: - restore_mqd() writes 2048 bytes into a 512-byte SDMA MQD buffer, corrupting 1536 bytes of adjacent GTT memory (often the ring buffer or neighboring MQDs)
This is a copy-paste regression unique to v11. All other ASIC backends (cik, vi, v9, v10, v12) correctly use the SDMA-specific variants.
Add checkpoint_mqd_sdma() and restore_mqd_sdma() functions that properly handle the smaller v11_sdma_mqd structure, matching the pattern used in other MQD managers.
(cherry picked from commit 6fa41db7ffdec97d62433adf03b7b9b759af8c2c)
Which versions are affected by CVE-2026-53143?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53143?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-53143 being exploited?
There is no known exploitation of CVE-2026-53143 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-90944, BELL-CVE-2026-53143, DEBIAN-CVE-2026-53143, GHSA-c92m-wmf9-qxfw, ROOT-OS-DEBIAN-12-CVE-2026-53143, ROOT-OS-UBUNTU-2404-CVE-2026-53143 and 1 more.