#VU115173 NULL pointer dereference in libssh - CVE-2025-8114

Vulnerability identifier: #VU115173

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-8114

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libssh
Universal components / Libraries / Libraries used by multiple products

Vendor: libssh

Description

The vulnerability allows a remote user 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 user can pass specially crafted data to the application and perform a denial of service (DoS) attack against the client or server apps.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

libssh: 0.3.0 - 0.11.2

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=2383220

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.