CVE-2023-45802

When a HTTP/2 stream was reset (RST frame) by a client, there was a time
window were the request’s memory resources were not reclaimed immediately.
Instead, de-allocation was deferred to connection close. A client could
send new requests and resets, keeping the connection busy and open and
causing the memory footprint to keep on growing. On connection close, all
resources were reclaimed, but the process might run out of memory before
that. This was found by the reporter during testing of CVE-2023-44487
(HTTP/2 Rapid Reset Exploit) with their own test client. During “normal”
HTTP/2 use, the probability to hit this bug is very low. The kept memory
would not become noticeable before the connection closes or times out.
Users are recommended to upgrade to version 2.4.58, which fixes the issue.

Notes