USN-8036-1

Asim Viladi Oglu Manizada discovered that HAProxy incorrectly handled certain INITIAL packets. A remote attacker could possibly use this issue to cause HAProxy to crash, resulting in a denial of service.

References

Affected packages

Ubuntu:25.10 / haproxy

Package

Name: haproxy
Purl: pkg:deb/ubuntu/haproxy@3.0.12-0ubuntu0.25.10.3?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.0.12-0ubuntu0.25.10.3

Affected versions

3.*

3.0.8-1ubuntu1

3.0.8-1ubuntu1.1

3.0.10-1ubuntu1

3.0.10-1ubuntu2

3.0.10-1ubuntu3

3.0.12-0ubuntu0.25.10.1

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "3.0.12-0ubuntu0.25.10.3",
            "binary_name": "haproxy"
        },
        {
            "binary_version": "3.0.12-0ubuntu0.25.10.3",
            "binary_name": "vim-haproxy"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8036-1.json"

cves_map

{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "id": "CVE-2026-26081",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}