CVE-2020-14363

An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.

• CWE-190
• CWE-416
• CWE-190

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14363Issue Tracking, Third Party Advisory
• https://github.com/Ruia-ruia/Exploits/blob/master/DFX11details.txtThird Party Advisory
• https://github.com/Ruia-ruia/Exploits/blob/master/x11doublefree.shExploit, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2C7LJBTLXF/
• https://lists.x.org/archives/xorg-announce/2020-August/003056.htmlVendor Advisory
• https://usn.ubuntu.com/4487-2/Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14363Issue Tracking, Third Party Advisory
• https://github.com/Ruia-ruia/Exploits/blob/master/DFX11details.txtThird Party Advisory
• https://github.com/Ruia-ruia/Exploits/blob/master/x11doublefree.shExploit, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2C7LJBTLXF/
• https://lists.x.org/archives/xorg-announce/2020-August/003056.htmlVendor Advisory
• https://usn.ubuntu.com/4487-2/Third Party Advisory

Published

Sep 11, 2020

Last Modified

Jun 17, 2026

Status

Modified

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