CVE-2025-8277: Red Hat Enterprise Linux 10

Low severity, CVSS 3.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Red Hat Red Hat Enterprise Linux 10
• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9: before 0:0.10.4-18.el9 (fixed in 0:0.10.4-18.el9)
• Red Hat Red Hat Openshift Container Platform 4

Published 2025-09-09. Last modified 2026-09-01.