USN-7299-3: X.Org X Server regression

12 March 2025

USN-7299-2 caused a regression in X.Org X Server.

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Details

USN-7299-2 fix vulnerabilities in X.Org X Server. This fix caused
regression in Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. This update
reverts it pending further investigation.

Original advisory details:

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
certain memory operations. An attacker could use these issues to cause the
X Server to crash, leading to a denial of service, or possibly execute
arbitrary code.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 18.04
Ubuntu 16.04

After a standard system update you need to reboot your computer to make all
the necessary changes.

References

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