Ubuntu CA Certificates Important Update Advisory USN-8436-1

ubuntu

June 16, 2026

The CA certificates in the ca-certificates package were updated.

Summary

The CA certificates in the ca-certificates package were updated.

Software Description:

- ca-certificates: Common CA certificates

Details:

The ca-certificates package contained outdated CA certificates. This update

refreshes the included certificates to those contained in the 2.86 version

of the Mozilla certificate authority bundle.

Topics Covered

security advisory update Ubuntu issue certificate ca-certificates

Update Instructions

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

Ubuntu 26.04 LTS
  ca-certificates                 20260601~26.04.1

Ubuntu 25.10
  ca-certificates                 20260601~25.10.1

Ubuntu 24.04 LTS
  ca-certificates                 20260601~24.04.1

Ubuntu 22.04 LTS
  ca-certificates                 20260601~22.04.1

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