CVE-2018-14600

Name: CVE-2018-14600
Creator: NVD / NIST
Published: 2018-08-24T19:29:01.567+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 9.71%

Last modified Jun 17, 2026

CVE-2018-14600 is a vulnerability of currently unknown severity. An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.. EPSS estimates a 9.71% chance of exploitation in the next 30 days.

Description

An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.

Metrics

EPSS Probability

9.71%

94.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
X.Org	Libx11	<= 1.6.5
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Debian	Debian Linux	8.0

References

http://www.openwall.com/lists/oss-security/2018/08/21/6Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/105177Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041543Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2019:2079
https://bugzilla.suse.com/show_bug.cgi?id=1102068Issue Tracking, Patch, Third Party Advisory
https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27feaPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00030.htmlMailing List, Third Party Advisory
https://lists.x.org/archives/xorg-announce/2018-August/002916.htmlThird Party Advisory
https://security.gentoo.org/glsa/201811-01Third Party Advisory
https://usn.ubuntu.com/3758-1/Third Party Advisory
https://usn.ubuntu.com/3758-2/Third Party Advisory
http://www.openwall.com/lists/oss-security/2018/08/21/6Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/105177Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041543Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2019:2079
https://bugzilla.suse.com/show_bug.cgi?id=1102068Issue Tracking, Patch, Third Party Advisory
https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27feaPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00030.htmlMailing List, Third Party Advisory
https://lists.x.org/archives/xorg-announce/2018-August/002916.htmlThird Party Advisory
https://security.gentoo.org/glsa/201811-01Third Party Advisory
https://usn.ubuntu.com/3758-1/Third Party Advisory
https://usn.ubuntu.com/3758-2/Third Party Advisory

Timeline

Published: Aug 24, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-14600?

How severe is CVE-2018-14600?

Severity scoring for CVE-2018-14600 is pending analysis. The EPSS model estimates a 9.71% probability of exploitation in the next 30 days.

How do I fix CVE-2018-14600?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-14600?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST