NULL pointer dereference in libssh - CVE-2025-8114
Published: September 12, 2025 / Updated: February 24, 2026
Vulnerability identifier: #VU115173
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-8114
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: libssh
Affected software:
libssh
libssh
Detailed vulnerability description
The vulnerability allows a remote attack to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error when calculating the session ID during the key exchange (KEX) process. A remote attacker can trick the victim into connecting to a malicious SSH server and crash the client app.
How to mitigate CVE-2025-8114
Install update from vendor's website.