NULL Pointer Dereference Affecting kernel-rt-debuginfo package, versions <0:6.12.0-55.58.1.el10_0


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.18% (9th percentile)

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  • Snyk IDSNYK-RHEL10-KERNELRTDEBUGINFO-15180171
  • published3 Feb 2026
  • disclosed4 Dec 2025

Introduced: 4 Dec 2025

CVE-2025-40240  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade RHEL:10 kernel-rt-debuginfo to version 0:6.12.0-55.58.1.el10_0 or higher.
This issue was patched in RHSA-2026:1727.

NVD Description

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

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

sctp: avoid NULL dereference when chunk data buffer is missing

chunk->skb pointer is dereferenced in the if-block where it's supposed to be NULL only.

chunk->skb can only be NULL if chunk->head_skb is not. Check for frag_list instead and do it just before replacing chunk->skb. We're sure that otherwise chunk->skb is non-NULL because of outer if() condition.

CVSS Base Scores

version 3.1