CVE-2025-11230

Publication date 2 October 2025

Last updated 19 November 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests.

Read the notes from the security team

Status

Package Ubuntu Release Status
haproxy 25.04 plucky
Fixed 3.0.8-1ubuntu1.2
24.04 LTS noble
Fixed 2.8.5-1ubuntu3.4
22.04 LTS jammy
Fixed 2.4.24-0ubuntu0.22.04.3
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected

Notes

mdeslaur

CRD is still TBD per upstream, json converter was introduced in 2.4, need to check

Patch details

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

Package Patch details
haproxy

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references