CVE-2018-14598

Name: CVE-2018-14598
Creator: NVD / NIST
Published: 2018-08-24T19:29:01.377+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.76%

Last modified Jun 17, 2026

CVE-2018-14598 is a vulnerability of currently unknown severity. An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed later on, leading to DoS (segmentation fault).. EPSS estimates a 4.76% chance of exploitation in the next 30 days.

Description

An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed later on, leading to DoS (segmentation fault).

Metrics

EPSS Probability

4.76%

90.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

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
Fedoraproject	Fedora	28

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=1102073Issue Tracking, Patch, Third Party Advisory
https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=e83722768fd5c467ef61fa159e8c6278770b45c2Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00030.htmlThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGARUV66TS5OOSLR5A76BUB7SDV6GO4F/
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=1102073Issue Tracking, Patch, Third Party Advisory
https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=e83722768fd5c467ef61fa159e8c6278770b45c2Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00030.htmlThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGARUV66TS5OOSLR5A76BUB7SDV6GO4F/
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-2018-14598?

How severe is CVE-2018-14598?

Severity scoring for CVE-2018-14598 is pending analysis. The EPSS model estimates a 4.76% probability of exploitation in the next 30 days.

How do I fix CVE-2018-14598?

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-2018-14598?

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

Scan your code now

Source: NVD / NIST