CVE-2025-40158 Affecting kernel-rt-debug-core package, versions <0:6.12.0-124.31.1.el10_1


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-ROCKY10-KERNELRTDEBUGCORE-15249636
  • published9 Feb 2026
  • disclosed12 Nov 2025

Introduced: 12 Nov 2025

CVE-2025-40158  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:10 kernel-rt-debug-core to version 0:6.12.0-124.31.1.el10_1 or higher.
This issue was patched in RLSA-2026:1690.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-core package and not the kernel-rt-debug-core package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:10 relevant fixed versions and status.

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

ipv6: use RCU in ip6_output()

Use RCU in ip6_output() in order to use dst_dev_rcu() to prevent possible UAF.

We can remove rcu_read_lock()/rcu_read_unlock() pairs from ip6_finish_output2().

CVSS Base Scores

version 3.1