Incorrect Calculation Affecting libssh-config package, versions <0:0.9.6-16.el8_10


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-ALMALINUX8-LIBSSHCONFIG-14152128
  • published1 Dec 2025
  • disclosed24 Nov 2025

Introduced: 24 Nov 2025

NewCVE-2025-5372  (opens in a new tab)
CWE-682  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 libssh-config to version 0:0.9.6-16.el8_10 or higher.
This issue was patched in ALSA-2025:21977.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh-config package and not the libssh-config package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.

CVSS Base Scores

version 3.1