Incorrect Check of Function Return Value Affecting libssh package, versions <0:0.12.0-3.el10_2


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.3% (23rd percentile)

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  • Snyk IDSNYK-RHEL10-LIBSSH-18872149
  • published18 Aug 2026
  • disclosed21 Jul 2026

Introduced: 21 Jul 2026

CVE-2026-59847  (opens in a new tab)
CWE-253  (opens in a new tab)

How to fix?

Upgrade RHEL:10 libssh to version 0:0.12.0-3.el10_2 or higher.
This issue was patched in RHSA-2026:55855.

NVD Description

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

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.

CVSS Base Scores

version 3.1