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[USN-8947-1] NSS update

Posted on 21 October 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8947-1
October 21, 2026

nss update
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.10
- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

The CA certificates in the nss package were updated.

Software Description:
- nss: Network Security Service library

Details:

This update removes the "emSign ECC Root CA - G3" and "Comodo AAA Services
root" CA certificate due to intermediate CA certificates being compromised.

Update instructions:

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

Ubuntu 26.10
libnss3 2:3.127-1ubuntu0.1

Ubuntu 26.04 LTS
libnss3 2:3.120-1ubuntu2.2

Ubuntu 24.04 LTS
libnss3 2:3.98-1ubuntu0.3

Ubuntu 22.04 LTS
libnss3 2:3.98-0ubuntu0.22.04.5

Ubuntu 20.04 LTS
libnss3 2:3.98-0ubuntu0.20.04.2+esm2
Available with Ubuntu Pro

Ubuntu 18.04 LTS
libnss3 2:3.35-2ubuntu2.16+esm2
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libnss3 2:3.28.4-0ubuntu0.16.04.14+esm6
Available with Ubuntu Pro
libnss3-1d 2:3.28.4-0ubuntu0.16.04.14+esm6
Available with Ubuntu Pro
libnss3-nssdb 2:3.28.4-0ubuntu0.16.04.14+esm6
Available with Ubuntu Pro

Ubuntu 14.04 LTS
libnss3 2:3.28.4-0ubuntu0.14.04.5+esm14
Available with Ubuntu Pro
libnss3-1d 2:3.28.4-0ubuntu0.14.04.5+esm14
Available with Ubuntu Pro
libnss3-nssdb 2:3.28.4-0ubuntu0.14.04.5+esm14
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8947-1
https://bugs.launchpad.net/bugs/2171737

Package Information:
https://launchpad.net/ubuntu/+source/nss/2:3.127-1ubuntu0.1
https://launchpad.net/ubuntu/+source/nss/2:3.120-1ubuntu2.2
https://launchpad.net/ubuntu/+source/nss/2:3.98-1ubuntu0.3
https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.22.04.5

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