USN-7478-1: Corosync vulnerability

Publication date

5 May 2025

Overview

Corosync could be made to crash if it received specially crafted network traffic.


Packages

  • corosync - cluster engine daemon and utilities

Details

It was discovered that Corosync incorrectly handled certain large UDP
packets. If encryption is disabled, or an attacker knows the encryption
key, this issue could be used to cause Corosync to crash, resulting in a
denial of service.

It was discovered that Corosync incorrectly handled certain large UDP
packets. If encryption is disabled, or an attacker knows the encryption
key, this issue could be used to cause Corosync to crash, resulting in a
denial of service.

Update instructions

After a standard system update you need to restart Corosync to make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
24.10 oracular corosync –  3.1.8-2ubuntu1.1
24.04 noble corosync –  3.1.7-1ubuntu3.1
22.04 jammy corosync –  3.1.6-1ubuntu1.1
20.04 focal corosync –  3.0.3-2ubuntu2.2

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