USN-7949-1: Sodium vulnerability

USN-7949-1: Sodium vulnerability

Publication date: 8 January 2026
Overview: Sodium could be made to expose sensitive information.

Packages
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
In general, a standard system update will make all the necessary changes.
The problem can be corrected by updating your system to the following package versions:

25.10 questing

• libsodium23 – 1.0.18-1ubuntu0.25.10.1

25.04 plucky

• libsodium23 – 1.0.18-1ubuntu0.25.04.1

24.04 LTS noble

• libsodium23 – 1.0.18-1ubuntu0.24.04.1

22.04 LTS jammy

• libsodium23 – 1.0.18-1ubuntu0.22.04.1