Out-of-bounds Read Affecting perf-debuginfo package, versions <0:4.18.0-553.126.1.el8_10


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.08% (23rd percentile)

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  • Snyk IDSNYK-ROCKY8-PERFDEBUGINFO-17115866
  • published1 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:8 perf-debuginfo to version 0:4.18.0-553.126.1.el8_10 or higher.
This issue was patched in RLSA-2026:21706.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf-debuginfo package and not the perf-debuginfo package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 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