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[USN-9001-2] ca-certificates update

Posted on 09 November 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-9001-2
November 09, 2026

ca-certificates update
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

ca-certificates would not properly update the JKS keystore.

Software Description:
- ca-certificates: Common CA certificates
- ca-certificates-java: Common CA certificates (JKS keystore)

Details:

USN-9001-1 fixed a vulnerability in ca-certificates, ca-certificates-java.
This update provides the corresponding fix for Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS.

Original advisory details:

It was discovered that the ca-certificates JKS integration was not working
properly, resulting in CA certificates removed from the system bundle not
being removed from the JKS keystore. This update corrects the feature and
resyncs the keystore with the system CA certificates list.

Update instructions:

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

Ubuntu 20.04 LTS
ca-certificates 20240203~20.04.2ubuntu0.1~esm3
Available with Ubuntu Pro
ca-certificates-java 20190405ubuntu1.2~esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
ca-certificates 202402031ubuntu0.18.04.2+esm4
Available with Ubuntu Pro
ca-certificates-java 20180516ubuntu1~18.04.3+esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-9001-2
https://ubuntu.com/security/notices/USN-9001-1
https://bugs.launchpad.net/bugs/2061817

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