CVE-2025-8114

Publication date 24 July 2025

Last updated 4 November 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

4.7 · Medium

Score breakdown

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

Package Ubuntu Release Status
libssh 25.10 questing
Fixed 0.11.2-1ubuntu0.1
25.04 plucky
Fixed 0.11.1-1ubuntu0.2
24.04 LTS noble
Fixed 0.10.6-2ubuntu0.2
22.04 LTS jammy
Fixed 0.9.6-2ubuntu0.22.04.5
20.04 LTS focal
Fixed 0.9.3-2ubuntu2.5+esm2
18.04 LTS bionic
Fixed 0.8.0~20170825.94fa1e38-1ubuntu0.7+esm5
16.04 LTS xenial
Fixed 0.6.3-4.3ubuntu0.6+esm3

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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

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

References

Related Ubuntu Security Notices (USN)

Other references