NULL Pointer Dereference Affecting kernel-macros package, versions <6.4.0-150700.53.34.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-SLES157-KERNELMACROS-15852931
  • published31 Mar 2026
  • disclosed26 Mar 2026

Introduced: 26 Mar 2026

CVE-2026-23063  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 kernel-macros to version 6.4.0-150700.53.34.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-macros package and not the kernel-macros package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

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

uacce: ensure safe queue release with state management

Directly calling put_queue carries risks since it cannot guarantee that resources of uacce_queue have been fully released beforehand. So adding a stop_queue operation for the UACCE_CMD_PUT_Q command and leaving the put_queue operation to the final resource release ensures safety.

Queue states are defined as follows:

  • UACCE_Q_ZOMBIE: Initial state
  • UACCE_Q_INIT: After opening uacce
  • UACCE_Q_STARTED: After start is issued via ioctl

When executing poweroff -f in virt while accelerator are still working, uacce_fops_release and uacce_remove may execute concurrently. This can cause uacce_put_queue within uacce_fops_release to access a NULL ops pointer. Therefore, add state checks to prevent accessing freed pointers.

CVSS Base Scores

version 3.1