CVE-2026-53143 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-53143HIGH

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

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  H  H    7.8   .0014    4.1     —

AFFECTED
  Product  Versions                                    Fixed
  Linux    cc009e613de6560eb499f8bc92c80a737752cb30 –  —
  Linux    5.19 –                                      6.6.143

TIMELINE
  Jun 9   Reserved by Linux
  Jun 25  Published (CNA: Linux)
  Aug 3   RESCORED — CVE-2026-53143 (Linux). CVSS 7 → 7.8 (NVD).

CWE-787, CWE-131 · CNA: Linux · CVSS v3.1 · 8 references · NVD status: Analyzed

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)

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 9, 2026	Reserved	Reserved by Linux
June 25, 2026	Published	Published (CNA: Linux)
August 3, 2026	RESCORED	RESCORED — CVE-2026-53143 (Linux). CVSS 7 → 7.8 (NVD).

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Linux	Linux	—	cc009e613de6560eb499f8bc92c80a737752cb30	—
Linux	Linux	—	5.19	6.6.143

Weaknesses

CWE-787 · CWE-131

References (8)

https://access.redhat.com/security/cve/CVE-2026-53143 [Third Party Advisory]
https://bugzilla.redhat.com/show_bug.cgi?id=2492719 [Third Party Advisory]
https://git.kernel.org/stable/c/16dad1fb0d783a4008de30e32d0038c393de05b1 [Patch]
https://git.kernel.org/stable/c/2c5b66c9b4057b385566940935ebc32f6e6ebfd2 [Patch]
https://git.kernel.org/stable/c/352ea59028ea48a6fff77f19ae28f98f71946a80 [Patch]
https://git.kernel.org/stable/c/d02f05d30f35b036f7cbaf72de634affb5b38ec6 [Patch]
https://git.kernel.org/stable/c/d3efcadfe3eea5b4263b8f2d4463b15c9fc46a64 [Patch]
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53143.json [Third Party Advisory]

Authoritative record: CVE-2026-53143 at cve.org

Vendors: linux

Weaknesses: CWE-787 · CWE-131

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-53143 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.