CVE-2018-15859

Description

Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because lookup failures are mishandled.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.07%
Vendor Advisory gentoo.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://security.gentoo.org/glsa/201810-05 third party advisory vendor advisory
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html patch mailing list third party advisory
https://usn.ubuntu.com/3786-1/ third party advisory vendor advisory
https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634 third party advisory patch
https://usn.ubuntu.com/3786-2/ third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:2079 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-15859?
CVE-2018-15859 has been scored as a medium severity vulnerability.
How to fix CVE-2018-15859?
To fix CVE-2018-15859, 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-2018-15859 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-15859 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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