SB2026021928 - Ubuntu update for libssh
Published: February 19, 2026 Updated: February 24, 2026
Security Bulletin ID
SB2026021928
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Memory leak (CVE-ID: CVE-2025-8277)
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak when handling key exchange (KEX) processes if a client repeatedly sends incorrect KEX guesses. A remote attacker can trick the victim into connecting to a malicious SSH sever, force the application to leak memory and perform denial of service attack.
Remediation
Install update from vendor's website.