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USN-5188-1: Keepalived vulnerability

13 December 2021

Keepalived could be made to access-control bypass if it received a specially crafted message.



  • keepalived - Failover and monitoring daemon for LVS clusters


It was discovered that Keepalived incorrectly handled certain messages.
An attacker could possibly use this issue to access-control bypass.

Update instructions

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

Ubuntu 21.10
Ubuntu 21.04
Ubuntu 20.04
Ubuntu 18.04

In general, a standard system update will make all the necessary changes.