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[USN-8711-1] Libgcrypt vulnerability

Posted on 01 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8711-1
September 01, 2026

libgcrypt20 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Libgcrypt could be made to expose sensitive information over the network.

Software Description:
- libgcrypt20: LGPL Crypto library

Details:

It was discovered that Libgcrypt had a timing-based side-channel flaw in
its RSA implementation. A remote attacker could possibly use this issue to
obtain sensitive information.

Update instructions:

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

Ubuntu 26.04 LTS
libgcrypt20 1.12.0-2ubuntu1.1

Ubuntu 24.04 LTS
libgcrypt20 1.10.3-2ubuntu0.2

Ubuntu 22.04 LTS
libgcrypt20 1.9.4-3ubuntu3.3

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

References:
https://ubuntu.com/security/notices/USN-8711-1
CVE-2024-2236

Package Information:
https://launchpad.net/ubuntu/+source/libgcrypt20/1.12.0-2ubuntu1.1
https://launchpad.net/ubuntu/+source/libgcrypt20/1.10.3-2ubuntu0.2
https://launchpad.net/ubuntu/+source/libgcrypt20/1.9.4-3ubuntu3.3

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