Ubuntu Security Notice 4905-2 - USN-4905-1 fixed a vulnerability in X.Org. This update provides the corresponding update for Ubuntu 14.04 ESM. Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled certain lengths of XInput extension ChangeFeedbackControl requests. An attacker could use this issue to cause the server to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.
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Red Hat Security Advisory 2021-2033-01 - X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Issues addressed include a privilege escalation vulnerability.
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Gentoo Linux Security Advisory 202104-2 - A vulnerability in X.Org X Server may allow users to escalate privileges. Versions less than 1.20.11 are affected.
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Debian Linux Security Advisory 4893-1 - Jan-Niklas Sohn discovered that missing input sanitising in the XInput extension of the X.org X server may result in privilege escalation if the X server is running privileged.
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Ubuntu Security Notice 4905-1 - Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled certain lengths of XInput extension ChangeFeedbackControl requests. An attacker could use this issue to cause the server to crash, resulting in a denial of service, or possibly execute arbitrary code.
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