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[USN-7949-1] Sodium vulnerability

Posted on 08 January 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7949-1
January 08, 2026

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

- Ubuntu 25.10
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Sodium could be made to expose sensitive information.

Software Description:
- libsodium: Network communication, cryptography and signaturing library

Details:

It was discovered that Sodium incorrectly handled the elliptic curve point
validity check in certain atypical use cases. This could result in invalid
points being used, contrary to expectations.

Update instructions:

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

Ubuntu 25.10
libsodium23 1.0.18-1ubuntu0.25.10.1

Ubuntu 25.04
libsodium23 1.0.18-1ubuntu0.25.04.1

Ubuntu 24.04 LTS
libsodium23 1.0.18-1ubuntu0.24.04.1

Ubuntu 22.04 LTS
libsodium23 1.0.18-1ubuntu0.22.04.1

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

References:
https://ubuntu.com/security/notices/USN-7949-1
CVE-2025-69277

Package Information:
https://launchpad.net/ubuntu/+source/libsodium/1.0.18-1ubuntu0.25.10.1
https://launchpad.net/ubuntu/+source/libsodium/1.0.18-1ubuntu0.25.04.1
https://launchpad.net/ubuntu/+source/libsodium/1.0.18-1ubuntu0.24.04.1
https://launchpad.net/ubuntu/+source/libsodium/1.0.18-1ubuntu0.22.04.1

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