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USN-5688-1: Libksba vulnerability

19 October 2022

Libksba could be made to crash or run programs if it decoded specially crafted data.



  • libksba - X.509 and CMS support library


It was discovered that an integer overflow could be triggered in Libksba
when decoding certain data. An attacker could use this issue to cause a
denial of service (application crash) or possibly execute arbitrary code.

Update instructions

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

Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

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


Related notices

  • USN-5688-2: libksba-dev, libksba8, libksba-mingw-w64-dev, libksba