Ubuntu Security Update USN-6453-1: X.Org X Server vulnerabilities

[LinuxBot]

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled prepending values to certain properties. An attacker could possibly use this issue to cause the X Server to crash, execute arbitrary code, or escalate privileges. (CVE-2023-5367) Sri discovered that the X.Org X Server incorrectly handled detroying windows in certain legacy multi-screen setups. An attacker could possibly use this issue to cause the X Server to crash, execute arbitrary code, or escalate privileges. (CVE-2023-5380)

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