CVE-2025-38477 Affecting kernel-default-base package, versions <5.14.21-150500.55.121.2.150500.6.57.2


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (9th percentile)

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  • Snyk IDSNYK-SLES155-KERNELDEFAULTBASE-13046676
  • published25 Sept 2025
  • disclosed24 Sept 2025

Introduced: 24 Sep 2025

NewCVE-2025-38477  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 kernel-default-base to version 5.14.21-150500.55.121.2.150500.6.57.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-default-base package and not the kernel-default-base package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

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

net/sched: sch_qfq: Fix race condition on qfq_aggregate

A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free.

This patch addresses the issue by:

  1. Moved qfq_destroy_class into the critical section.

  2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.

CVSS Base Scores

version 3.1