CVE-2025-38637 Affecting kernel-syms package, versions <6.4.0-150700.53.3.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.07% (22nd percentile)

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  • Snyk IDSNYK-SLES157-KERNELSYMS-10357763
  • published14 Jun 2025
  • disclosed13 Jun 2025

Introduced: 13 Jun 2025

NewCVE-2025-38637  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 kernel-syms to version 6.4.0-150700.53.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-syms package and not the kernel-syms 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:

net_sched: skbprio: Remove overly strict queue assertions

In the current implementation, skbprio enqueue/dequeue contains an assertion that fails under certain conditions when SKBPRIO is used as a child qdisc under TBF with specific parameters. The failure occurs because TBF sometimes peeks at packets in the child qdisc without actually dequeuing them when tokens are unavailable.

This peek operation creates a discrepancy between the parent and child qdisc queue length counters. When TBF later receives a high-priority packet, SKBPRIO's queue length may show a different value than what's reflected in its internal priority queue tracking, triggering the assertion.

The fix removes this overly strict assertions in SKBPRIO, they are not necessary at all.

CVSS Base Scores

version 3.1