5.5

CVE-2018-15858: canonical ubuntu_linux NULL Pointer Dereference

CVSS: 5.5v3.0MediumModified
AliasesUBUNTU-CVE-2018-15858DEBIAN-CVE-2018-15858
Published 25-08-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-15858 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.9% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.0 (NVD)
EPSS score
0.43%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 4
MGASA-2018-0369SUSE-SU-2018:3685-1SUSE-SU-2024:0037-1USN-3786-1USN-3786-2

Timeline

  1. 25-08-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

Unchecked NULL pointer usage when handling invalid aliases in CopyKeyAliasesToKeymap in xkbcomp/keycodes.c in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

0.00 pp

From 0.43% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Xkbcommon2 products
Canonical1 product
Debian1 product
  • libxkbcommon< 0.8.2-1
Ubuntu1 product
  • libxkbcommon< 0.5.0-1ubuntu2.1 | < 0.8.0-1ubuntu0.1

4 vendors · 5 products

References

10 links