A regression in HAProxy on Ubuntu 22.04 LTS caused by an update fixed in USN-8972-1 led to improper handling of certain chunked HTTP/1.1 requests and truncated HTTP/2 PING frames. These issues could allow a remote attacker to cause HAProxy to consume excessive CPU resources, resulting in denial of service. The problem has been fixed in version 2.4.30-0ubuntu0.22.04.4.