Debian 11: Corosync Critical Stack Overflow Fix DLA-4308-1

An issue has been found in corosync, a cluster engine daemon and
utilities. A stack-based buffer overflow may happen when encryption is
disabled or the attacker knows the encryption key and a large crafted UDP
packet has to be processed.


For Debian 11 bullseye, this problem has been fixed in version
3.1.2-2+deb11u1.

We recommend that you upgrade your corosync packages.

For the detailed security status of corosync please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/corosync

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS