Memory Leak Affecting libssh package, versions <0.10.6-0+deb12u2


Severity

Recommended
0.0
low
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.43% (37th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-LIBSSH-18169582
  • published22 Jul 2026
  • 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 Echo:latest libssh to version 0.10.6-0+deb12u2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh package and not the libssh package as distributed by Echo. See How to fix? for Echo:latest 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