CVE-2018-14600

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 9.14% Top 10%
Vendor Advisory ubuntu.com Vendor Advisory gentoo.org Vendor Advisory ubuntu.com Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://usn.ubuntu.com/3758-2/ third party advisory vendor advisory
https://security.gentoo.org/glsa/201811-01 third party advisory vendor advisory
http://www.securityfocus.com/bid/105177 vdb entry third party advisory
https://bugzilla.suse.com/show_bug.cgi?id=1102068 issue tracking third party advisory patch
http://www.openwall.com/lists/oss-security/2018/08/21/6 third party advisory mailing list
http://www.securitytracker.com/id/1041543 vdb entry third party advisory
https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27fea third party advisory patch
https://lists.debian.org/debian-lts-announce/2018/08/msg00030.html third party advisory mailing list
https://lists.x.org/archives/xorg-announce/2018-August/002916.html third party advisory mailing list
https://usn.ubuntu.com/3758-1/ third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:2079 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-14600?
CVE-2018-14600 has been scored as a critical severity vulnerability.
How to fix CVE-2018-14600?
To fix CVE-2018-14600, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-14600 being actively exploited in the wild?
It is possible that CVE-2018-14600 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~9% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.