CVE-2026-53143

/// Technical 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 sm

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References