Vulnerability in Xkbcommon
CVE-2018-15856
An infinite loop when reaching EOL unexpectedly in compose/parser.c (aka the keymap parser) in xkbcommon before 0.8.1 could be used by local attackers to cause a denial of service during parsing of crafted keymap files.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (34.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Xkbcommon
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
Weakness classification (CWE)
References
- security.gentoo.org/glsa/201810-05 (vendor-advisory, Third Party Advisory)
- github.com/xkbcommon/libxkbcommon/commit/842e4351c2c97de6051cab6ce36b4a81e709a0… (Patch, Third Party Advisory)
- usn.ubuntu.com/3786-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3786-2/ (vendor-advisory, Third Party Advisory)
- lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html (Patch, Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:2079 (vendor-advisory)
Frequently asked questions
- What is CVE-2018-15856?
- CVE-2018-15856 is a medium-severity vulnerability in Xkbcommon, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2018-08-25.
- How severe is CVE-2018-15856?
- Medium severity. CVSS v3 base score is 5.5 out of 10.