CVE-2025-8114

Publication date 24 July 2025

Last updated 15 September 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was found in libssh, a library that implements the SSH protocol. When calculating the session ID during the key exchange (KEX) process, an allocation failure in cryptographic functions may lead to a NULL pointer dereference. This issue can cause the client or server to crash.

Read the notes from the security team

Why is this CVE low priority?

Only a denial of service if allocation failure occurs

Learn more about Ubuntu priority

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libssh	25.10 questing	Vulnerable
	25.04 plucky	Vulnerable
	24.04 LTS noble	Vulnerable
	22.04 LTS jammy	Vulnerable
	20.04 LTS focal	Vulnerable
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Vulnerable

Notes

mdeslaur

This is only a denial of service if an allocation failure occurs, setting priority to low

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libssh	Upstream: ?h=stab

Severity score breakdown

Parameter	Value
Base score	4.7 · Medium
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H