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USN-4726-1: OpenJDK vulnerability

9 February 2021

OpenJDK could be made to crash if it received specially crafted input.




It was discovered that OpenJDK incorrectly handled the direct buffering of
characters. An attacker could use this issue to cause OpenJDK to crash,
resulting in a denial of service, or cause other unspecified impact.

Update instructions

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

Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any Java
applications or applets to make all the necessary changes.