CVE-2026-53143High· 7.0▾ Twilight

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

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_mq…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score39/ 100 · Low

impact 38.5 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Jun 25, 2026

Updated

Nov 6, 2026

CVSS

7.0

Vendor

Linux

Product

Linux

CWE

—

Depth score

39 · Low

EPSS

0.15% · p4

Platforms

—

Source

CVEORG

Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

decided 2026-11-06

Exploitation: none
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the CISA ADP record, not NVD.

EPSS history

Exploit-prediction probability, daily snapshots since Nov 6.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 134 days

Jun 25, 2026Published
Disclosed via CVEORG
Nov 6, 2026Record revised
Last analysed / modified upstream
Nov 6, 2026EPSS first tracked
0.2%

Linux #cve.org

Affected

Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < 16dad1fb0d783a4008de30e32d0038c393de05b1
Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < 2c5b66c9b4057b385566940935ebc32f6e6ebfd2
Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < d3efcadfe3eea5b4263b8f2d4463b15c9fc46a64
Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < d02f05d30f35b036f7cbaf72de634affb5b38ec6
Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < 352ea59028ea48a6fff77f19ae28f98f71946a80
Linux 5.19

Full technical detail▾

Overview

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

Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < 16dad1fb0d783a4008de30e32d0038c393de05b1
Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < 2c5b66c9b4057b385566940935ebc32f6e6ebfd2
Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < d3efcadfe3eea5b4263b8f2d4463b15c9fc46a64
Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < d02f05d30f35b036f7cbaf72de634affb5b38ec6
Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < 352ea59028ea48a6fff77f19ae28f98f71946a80
Linux 5.19

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org

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

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score39/ 100 · Low

impact 38.5 · likelihood 0 · exploitation 0

Overview

In the Linux kernel, the following vulnerability has been resolved:

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

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

Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < 16dad1fb0d783a4008de30e32d0038c393de05b1

Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < 2c5b66c9b4057b385566940935ebc32f6e6ebfd2

Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < d3efcadfe3eea5b4263b8f2d4463b15c9fc46a64

Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < d02f05d30f35b036f7cbaf72de634affb5b38ec6

Linux >= cc009e613de6560eb499f8bc92c80a737752cb30 < 352ea59028ea48a6fff77f19ae28f98f71946a80

Linux 5.19