Bug#1125713: apache2: Upgrade to 2.4.66-1~deb12u1 produces zombie PHP processes with FastCGI

Patrick Matthäi <[email protected]> Fri, 16 Jan 2026 15:18:52 +0100
Newsgroups gmane.linux.debian.devel.apache
Message-ID <176857313299.252457.14999303272745109202.reportbug__26721.37578936$1768573286$gmane$org@srv1.linux-dev.org>
Package: apache2
Version: 2.4.66-1~deb12u1
Severity: important
X-Debbugs-Cc: [email protected]

Hello,

we have got a bunch of servers which are managed with "Liveconfig" (an ISP panel).
There are many customers on it, so that are shared environments and Liveconfig sets up
every webspace with PHP and FastCGI.
=> Our php-fpm setups are not affected

Since we have upgraded from 2.4.65-1~deb12u1 to 2.4.66-1~deb12u1 we expirence very often
left over zombie PHP processes. I didnt find a reason for it, mostly that are responses
with status code 500, maybe sometimes bot requests, maybe a bunch of requests in a few
seconds where some php-cgi processes are not cleaned up correctly. I didnt found any
segfaults or something like that, yet. Regarding to #1125368, we also use h2.

Downgrading to 2.4.65-1~deb12u1 again solves this issue.