Use After Free in Xkbcommon Libxkbcommon
CVE-2018-15857
An invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be used by local attackers to crash xkbcommon keymap parsers or possibly have unspecified other impact by supplying a crafted keymap file.
Vulnerability class: Use-After-Free
EPSS: 0.004 (36.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 (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 (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2018-15857?
- CVE-2018-15857 is a high-severity vulnerability in Xkbcommon Libxkbcommon, classified under Use After Free. CVSS score: 7.8/10. Published 2018-08-25.
- How severe is CVE-2018-15857?
- High severity. CVSS v3 base score is 7.8 out of 10.