CVE-2018-15862 — NULL Pointer Dereference in Libxkbcommon

CWE-476 — NULL Pointer Dereference10 documents7 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 86.78%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Xkbcommon LibxkbcommonDebian LibxkbcommonXkbcommon+1 more
Timeline
PublishedAug 25
Latest updateMay 14

Description

Unchecked NULL pointer usage in LookupModMask 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 with invalid virtual modifiers.

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages5 packages

▶debiandebian/libxkbcommon< libxkbcommon 0.8.2-1 (bookworm)
▶Debianxkbcommon/libxkbcommon< 0.8.2-1+3
▶Ubuntuxkbcommon/libxkbcommon< 0.4.1-0ubuntu1.1+2

Also affects: Ubuntu Linux 14.04, 16.04, 18.04

Patches

Patch: github.com ↗Patch: lists.freedesktop.org ↗Patch: github.com ↗

🔴Vulnerability Details

4
GHSA
GHSA-qw38-vjfp-wm54: Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr↗2022-05-14
▶
OSV
libxkbcommon vulnerabilities↗2018-11-06
▶
OSV
libxkbcommon vulnerabilities↗2018-10-08
▶
OSV
CVE-2018-15862: Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr↗2018-08-25
▶

📋Vendor Advisories

4
Ubuntu
libxkbcommon vulnerabilities↗2018-11-06
▶
Ubuntu
libxkbcommon vulnerabilities↗2018-10-08
▶
Debian
CVE-2018-15862: libxkbcommon - Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr.c in xkbcommon bef...↗2018
▶
Red Hat
libxkbcommon: NULL pointer dereference in LookupModMask resulting in a crash↗2017-06-26
▶

💬Community

1
Bugzilla
CVE-2018-15862 libxkbcommon: NULL pointer dereference in LookupModMask resulting in a crash↗2018-08-28
▶