Memory Leak Affecting libssh-config package, versions <0:0.10.6-1.amzn2023.0.3


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBSSHCONFIG-13880927
  • published11 Nov 2025
  • disclosed9 Sept 2025

Introduced: 9 Sep 2025

CVE-2025-8277  (opens in a new tab)
CWE-401  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libssh-config to version 0:0.10.6-1.amzn2023.0.3 or higher.
This issue was patched in ALAS2023-2025-1264.

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 Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

A flaw was found in libssh's handling of key exchange (KEX) processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side, particularly when using libgcrypt, which impacts application stability and availability.

CVSS Base Scores

version 3.1