CVE-2018-15853: canonical ubuntu_linux Uncontrolled Resource Consumption
CVSS: 5.5v3.0MediumModified
AliasesALPINE-CVE-2018-15853UBUNTU-CVE-2018-15853DEBIAN-CVE-2018-15853
Published 25-08-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-15853 is a medium (CVSS 5.5) Uncontrolled Resource Consumption vulnerability in canonical ubuntu_linux. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.2% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.0 (NVD)EPSS score
0.54%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 12 · Related 9Timeline
- 25-08-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Endless recursion exists in xkbcomp/expr.c in xkbcommon and libxkbcommon before 0.8.1, which could be used by local attackers to crash xkbcommon users by supplying a crafted keymap file that triggers boolean negation.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 5.5Preferred score · NVD (NIST)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Low 2.1Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
0.54%
Chance of exploitation in the next 30 days
Percentile
44%
Versus all other CVEs
30-day change
0.00 pp
From 0.54% on 19-09-2026
19-09-202619-10-2026
EPSS score0.54%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- libxkbcommon< 0.8.2-1
- x11-xkb-utilsAll versions (No fix recorded)
Xkbcommon2 products
- libxkbcommon< 0.8.1
- xkbcommon< 0.8.1
Alpine1 product
- xkbcomp< 1.5.0-r0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04
Ubuntu1 product
- libxkbcommon< 0.4.1-0ubuntu1.1 | < 0.5.0-1ubuntu2.1 | < 0.8.0-1ubuntu0.1
5 vendors · 7 products
References
12 links- lists.freedesktop.org/archives/wayland-devel/2018-August/039232.htmlX Refsource MISCMailing ListPatchThird Party AdvisoryREPORT
- github.com/xkbcommon/libxkbcommon/commit/1f9d1248c07cda8aaff762429c0dce146de8632aX Refsource MISCPatchThird Party Advisory
