NULL pointer dereference in Xkbcommon Libxkbcommon
CVE-2018-15859
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.
EPSS: 0.005 (42.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Xkbcommon Libxkbcommon
- Xkbcommon
- Canonical Ubuntu_linux — versions 14.04, 16.04, 18.04
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- cve@mitre.org (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- cve@mitre.org (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2018-15859?
- CVE-2018-15859 is a medium-severity vulnerability in Xkbcommon Libxkbcommon, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2018-08-25.
- How severe is CVE-2018-15859?
- Medium severity. CVSS v3 base score is 5.5 out of 10.