CVE-2017-12186

Name: CVE-2017-12186
Creator: NVD / NIST
Published: 2018-01-24T15:29:00.903+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.38%

Last modified Jun 17, 2026

CVE-2017-12186 is a vulnerability of currently unknown severity. xorg-x11-server before 1.19.5 was missing length validation in X-Resource extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code.. EPSS estimates a 4.38% chance of exploitation in the next 30 days.

Description

xorg-x11-server before 1.19.5 was missing length validation in X-Resource extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code.

Metrics

EPSS Probability

4.38%

90.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
X.Org	X Server	< 1.19.5

References

https://bugzilla.redhat.com/show_bug.cgi?id=1509216Exploit, Issue Tracking, Patch, Third Party Advisory, VDB Entry
https://cgit.freedesktop.org/xorg/xserver/commit/?id=cad5a1050b7184d828aef9c1dd151c3ab649d37ePatch, Third Party Advisory
https://www.debian.org/security/2017/dsa-4000Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1509216Exploit, Issue Tracking, Patch, Third Party Advisory, VDB Entry
https://cgit.freedesktop.org/xorg/xserver/commit/?id=cad5a1050b7184d828aef9c1dd151c3ab649d37ePatch, Third Party Advisory
https://www.debian.org/security/2017/dsa-4000Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2017-12186?

xorg-x11-server before 1.19.5 was missing length validation in X-Resource extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code.

How severe is CVE-2017-12186?

Severity scoring for CVE-2017-12186 is pending analysis. The EPSS model estimates a 4.38% probability of exploitation in the next 30 days.

How do I fix CVE-2017-12186?

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-2017-12186?

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

Scan your code now

Source: NVD / NIST