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CVE-2026-53143 is a memory-safety vulnerability in the Linux kernel's drm/amdkfd component affecting GFX11 AMD KFD queue management. The flaw is in the v11 MQD manager, which incorrectly assigned the CP-compute checkpoint and restore handlers to KFD_MQD_TYPE_SDMA queues. As a result, checkpoint and restore operations used the size of struct v11_compute_mqd, 2048 bytes, instead of the correct struct v11_sdma_mqd size of 512 bytes. This size mismatch causes a 1536-byte overflow condition. During CRIU checkpoint of an SDMA queue, the vulnerable checkpoint path reads 2048 bytes from a 512-byte SDMA MQD buffer, exposing adjacent GTT memory to userspace. During CRIU restore, the vulnerable restore path writes 2048 bytes into a 512-byte SDMA MQD buffer, corrupting adjacent GTT memory. The issue is described as a v11-specific regression; other ASIC backends use SDMA-specific handlers correctly.
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A Linux kernel buffer overflow in drm/amdkfd on GFX11 where SDMA queue checkpoint/restore used the wrong MQD structure size, causing out-of-bounds read and write of 1536 bytes during CRIU checkpoint and restore.
A specific vulnerability affecting Red Hat Enterprise Linux 10.2 kernel-related packages; the content does not provide technical details beyond listing it in the advisory.
A specific vulnerability affecting Red Hat Enterprise Linux 9 kernel-related packages, referenced in RHSA-2026:57252.
Linux kernel drm/amdkfd buffer overflow in SDMA queue checkpoint/restore on GFX11.
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Cross-references every affected SKU, including bundled OEM variants.
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