Out-of-bounds Read Affecting kernel-64k-modules-core package, versions <0:6.12.0-211.18.1.el10_2


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.12% (31st percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Out-of-bounds Read vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-ROCKY10-KERNEL64KMODULESCORE-17181370
  • published5 Jun 2026
  • disclosed3 Apr 2026

Introduced: 3 Apr 2026

CVE-2026-23455  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:10 kernel-64k-modules-core to version 0:6.12.0-211.18.1.el10_2 or higher.
This issue was patched in RLSA-2026:21557.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-modules-core package and not the kernel-64k-modules-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:

netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()

In DecodeQ931(), the UserUserIE code path reads a 16-bit length from the packet, then decrements it by 1 to skip the protocol discriminator byte before passing it to DecodeH323_UserInformation(). If the encoded length is 0, the decrement wraps to -1, which is then passed as a large value to the decoder, leading to an out-of-bounds read.

Add a check to ensure len is positive after the decrement.

CVSS Base Scores

version 3.1