CVE-2026-53143
HighCVSS 7.0Exploitation Probability (EPSS)
Low risk3th percentile — higher than 3% of all known CVEs
Summary
A buffer overflow vulnerability was found in the Linux graphics driver (drm/amdkfd) in SDMA queue checkpoint/restore functions on GFX11 (Navi3x). The bug uses v11_compute_mqd (2048 bytes) instead of v11_sdma_mqd (512 bytes), causing a 1536-byte out-of-bounds read/write.
Risk Assessment
During checkpoint creation, 1536 bytes of adjacent GTT memory may leak to userspace, and during restore, that memory may be overwritten, potentially leading to data corruption, system crash, or privilege escalation.
Recommendation
Immediately update the Linux kernel to a version containing commit 6fa41db7ffdec97d62433adf03b7b9b759af8c2c or later. For production systems, apply the security patch from your distributor.
Original NVD description (English source)
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)