Ubuntu CA Certificates Important Update Advisory USN-8436-1
ubuntu
June 16, 2026
The CA certificates in the ca-certificates package were updated.
Summary
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS 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 Software Description: - ca-certificates: Common CA certificates Details: The ca-certificates package contained outdated CA certificates.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
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.
References
https://ubuntu.com/security/notices/USN-8436-1
https://launchpad.net/bugs/2156786
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Ubuntu Security Notice USN-8436-1
Topics Covered
Package Information
https://launchpad.net/ubuntu/+source/ca-certificates/20260601~26.04.1 https://launchpad.net/ubuntu/+source/ca-certificates/20260601~25.10.1 https://launchpad.net/ubuntu/+source/ca-certificates/20260601~24.04.1 https://launchpad.net/ubuntu/+source/ca-certificates/20260601~22.04.1
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