Out-of-bounds Read Affecting kernel-debug-modules-extra package, versions <0:5.14.0-687.12.1.el9_8


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.08% (23rd percentile)

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  • Snyk IDSNYK-ROCKY9-KERNELDEBUGMODULESEXTRA-17109616
  • published31 May 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:9 kernel-debug-modules-extra to version 0:5.14.0-687.12.1.el9_8 or higher.
This issue was patched in RLSA-2026:21556.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules-extra package and not the kernel-debug-modules-extra package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 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