CVE-2018-15858

Name: CVE-2018-15858
Creator: NVD / NIST
Published: 2018-08-25T21:29:02.063+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.43%

Last modified Jun 17, 2026

CVE-2018-15858 is a vulnerability of currently unknown severity. Unchecked NULL pointer usage when handling invalid aliases in CopyKeyAliasesToKeymap in xkbcomp/keycodes.c in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

Unchecked NULL pointer usage when handling invalid aliases in CopyKeyAliasesToKeymap in xkbcomp/keycodes.c in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file.

Metrics

EPSS Probability

0.43%

34.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Xkbcommon	Libxkbcommon	< 0.8.1
Xkbcommon	Xkbcommon	< 0.8.1
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04

References

https://github.com/xkbcommon/libxkbcommon/commit/badb428e63387140720f22486b3acbd3d738859fPatch, Third Party Advisory
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/201810-05Third Party Advisory
https://usn.ubuntu.com/3786-1/Third Party Advisory
https://usn.ubuntu.com/3786-2/Third Party Advisory
https://github.com/xkbcommon/libxkbcommon/commit/badb428e63387140720f22486b3acbd3d738859fPatch, Third Party Advisory
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/201810-05Third Party Advisory
https://usn.ubuntu.com/3786-1/Third Party Advisory
https://usn.ubuntu.com/3786-2/Third Party Advisory

Timeline

Published: Aug 25, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-15858?

How severe is CVE-2018-15858?

Severity scoring for CVE-2018-15858 is pending analysis. The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2018-15858?

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-2018-15858?

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

Scan your code now

Source: NVD / NIST