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Vulnerability of X.Org Server: buffer overflow via XInput Extension ChangeFeedbackControl

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via XInput Extension ChangeFeedbackControl of X.Org Server, in order to trigger a denial of service, and possibly to run code.
Impacted systems: Debian, Fedora, OpenBSD, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu, Unix (platform) ~ not comprehensive, XOrg Bundle ~ not comprehensive.
Severity of this alert: 2/4.
Creation date: 13/04/2021.
Références of this alert: CVE-2021-3472, DLA-2627-1, DSA-4893-1, FEDORA-2021-139f3fc21c, FEDORA-2021-f7b4c97879, openSUSE-SU-2021:0554-1, SUSE-SU-2021:1179-1, SUSE-SU-2021:1180-1, SUSE-SU-2021:1181-1, SUSE-SU-2021:1182-1, SUSE-SU-2021:1187-1, SUSE-SU-2021:1188-1, SUSE-SU-2021:14690-1, USN-4905-1, VIGILANCE-VUL-35063, ZDI-21-463.

Description of the vulnerability 

An attacker can trigger a buffer overflow via XInput Extension ChangeFeedbackCon...
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This cybersecurity announce impacts software or systems such as Debian, Fedora, OpenBSD, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu, Unix (platform) ~ not comprehensive, XOrg Bundle ~ not comprehensive.

Our Vigil@nce team determined that the severity of this threat alert is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this computer weakness alert.

Solutions for this threat 

This vulnerability workaround will be public soon.
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