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Linuxsecurity •LinuxSecurity Advisories • October 21, 2026

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The CA certificates in the ca-certificates package were updated. Software Description: - ca-certificates: Common CA certificates Details: USN-8944-1 updated ca-certificates. This update provides the corresponding changes for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS by removing the "emSign ECC Root CA - G3" and "Comodo AAA Services root" CA certificates. Original advisory details: This update removes the "emSign ECC Root CA - G3" CA certificate due to intermediate CA certificates being compromised. In addition, in Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS, the ca-certificates package contained outdated CA certificates. This update refreshes the included certificates to those contained in the 2.90 version of the Mozilla certificate authority bundle.

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

Software Description:

- ca-certificates: Common CA certificates

USN-8944-1 updated ca-certificates. This update provides the corresponding

changes for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and

Ubuntu 20.04 LTS by removing the "emSign ECC Root CA - G3" and "Comodo AAA

Services root" CA certificates.

Original advisory details:

This update removes the "emSign ECC Root CA - G3" CA certificate due to

intermediate CA certificates being compromised.

In addition, in Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS,

the ca-certificates package contained outdated CA certificates. This

update refreshes the included certificates to those contained in the 2.90

version of the Mozilla certificate authority bundle.

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS ca-certificates 20240203~20.04.1ubuntu0.1~esm2 Available with Ubuntu Pro Ubuntu 18.04 LTS ca-certificates 202402031ubuntu0.18.04.1+esm3 Available with Ubuntu Pro Ubuntu 16.04 LTS ca-certificates 202402031~16.04.1~esm3 Available with Ubuntu Pro Ubuntu 14.04 LTS ca-certificates 20230311~14.04.1~esm3 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.

Ubuntu Security Notice USN-8944-2

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