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Vulnerability record · CVE-2020-14344 · published 5 August 2020

CVE-2020-14344: X.org libx11 integer overflow vulnerability

XX.Org · Libx11

An integer overflow leading to a heap-buffer overflow was found in The X Input Method (XIM) client was implemented in libX11 before version 1.6.10. As per upstream this is security relevant when setuid programs call XIM client functions while running with elevated privileges. No such programs are shipped with Red Hat Enterprise Linux.

6.7 CVSS 3.1 Medium EPSS 0.46% · top 61.9% CWE-190 · Integer overflow
6.7CVSS 3.1 base score, v2 4.6
0.46%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
26References
17 Jun 2026Last modified by NVD

Description

An integer overflow leading to a heap-buffer overflow was found in The X Input Method (XIM) client was implemented in libX11 before version 1.6.10. As per upstream this is security relevant when setuid programs call XIM client functions while running with elevated privileges. No such programs are shipped with Red Hat Enterprise Linux.

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00014.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00015.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00024.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00031.html Mailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14344 Issue TrackingPatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VDDSAYV7XGNRCXE7HCU236
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XY4H2SIEF2362AMNX5ZKWAE
https://lists.x.org/archives/xorg-announce/2020-July/003050.html Mailing ListPatchVendor Advisory
https://security.gentoo.org/glsa/202008-18 Third Party Advisory
https://usn.ubuntu.com/4487-1/ Third Party Advisory
https://usn.ubuntu.com/4487-2/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/07/31/1 Mailing ListPatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00014.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00015.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00024.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00031.html Mailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14344 Issue TrackingPatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VDDSAYV7XGNRCXE7HCU236
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7AVXCQOSCAPKYYHFIJAZ6E2
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XY4H2SIEF2362AMNX5ZKWAE
https://lists.x.org/archives/xorg-announce/2020-July/003050.html Mailing ListPatchVendor Advisory
https://security.gentoo.org/glsa/202008-18 Third Party Advisory
https://usn.ubuntu.com/4487-1/ Third Party Advisory
https://usn.ubuntu.com/4487-2/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/07/31/1 Mailing ListPatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-14344), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.