CVE-2026-53143

Summary

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)

Affected Software

Weaknesses

ADP Enrichment

kernel: drm/amdkfd: Fix buffer overflow in SDMA queue checkpoint/restore on GFX11

Additional References

• https://access.redhat.com/security/cve/CVE-2026-53143
• https://bugzilla.redhat.com/show_bug.cgi?id=2492719
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53143.json

References

• https://git.kernel.org/stable/c/16dad1fb0d783a4008de30e32d0038c393de05b1
• https://git.kernel.org/stable/c/2c5b66c9b4057b385566940935ebc32f6e6ebfd2
• https://git.kernel.org/stable/c/d3efcadfe3eea5b4263b8f2d4463b15c9fc46a64
• https://git.kernel.org/stable/c/d02f05d30f35b036f7cbaf72de634affb5b38ec6
• https://git.kernel.org/stable/c/352ea59028ea48a6fff77f19ae28f98f71946a80

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