CVE-2026-53143
Received Received - Intake
Buffer Overflow in Linux Kernel AMDKFD SDMA Queue

Publication date: 2026-06-25

Last updated on: 2026-06-25

Assigner: kernel.org

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)
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Meta Information
Published
2026-06-25
Last Modified
2026-06-25
Generated
2026-06-25
AI Q&A
2026-06-25
EPSS Evaluated
N/A
NVD
CVE-2026-53143
EUVD
EUVD-2026-39234
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux kernel *
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Exploitability
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's drm/amdkfd component related to the SDMA queue checkpoint and restore functionality on GFX11 hardware.

The issue arises because the v11 MQD manager incorrectly uses checkpoint and restore functions designed for compute queues on SDMA queues. Specifically, it uses functions that handle a 2048-byte structure instead of the correct 512-byte structure, causing a 1536-byte buffer overflow.

During checkpointing, this causes 2048 bytes to be read from a 512-byte buffer, leaking 1536 bytes of adjacent graphics translation table (GTT) memory to userspace. During restore, 2048 bytes are written into the 512-byte buffer, corrupting adjacent memory such as ring buffers or neighboring MQDs.

This bug is a copy-paste regression unique to version 11 of the hardware, and was fixed by adding proper checkpoint and restore functions that handle the smaller SDMA MQD structure.

Impact Analysis

This vulnerability can lead to memory corruption and information leakage.

  • During checkpoint, sensitive adjacent GTT memory can be leaked to userspace, potentially exposing confidential data.
  • During restore, memory corruption can occur, which may cause instability, crashes, or unpredictable behavior in the graphics subsystem.
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