USN-8972-2

    Dashboard / Vulnerabilities / USN-8972-2

    USN-8972-2

    Published: 5 Nov 2026Last Modified: 6 Nov 2026

    Summary: haproxy regression

    Details: USN-8972-1 fixed vulnerabilities in HAProxy. On Ubuntu 22.04 LTS, the update caused a regression when processing certain chunked requests. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that HAProxy incorrectly handled truncated HTTP/2 PING frames. A remote attacker could possibly use this issue to cause HAProxy to consume excessive CPU resources, leading to a denial of service. (CVE-2026-110353) It was discovered that HAProxy incorrectly handled certain HTTP/1.1 chunked requests. A remote attacker could possibly use this issue to cause HAProxy to consume excessive CPU resources, leading to a denial of service. (CVE-2026-110354)

    References: https://ubuntu.com/security/notices/USN-8972-2, https://bugs.launchpad.net/bugs/2172897

    Affected packages

    Package

    Name: haproxy

    Purl: pkg:deb/ubuntu/haproxy?arch=source&distro=jammy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.4.30-0ubuntu0.22.04.4

    Affected versions

    2.2.9-2ubuntu2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    USN-8972-2 | CVE-DB