7.8

CVE-2018-15857: canonical ubuntu_linux Use After Free

CVSS: 7.8v3.0HighModified
AliasesUBUNTU-CVE-2018-15857DEBIAN-CVE-2018-15857
Published 25-08-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-15857 is a high (CVSS 7.8) Use After Free vulnerability in canonical ubuntu_linux. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.4% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.0 (NVD)
EPSS score
0.45%
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 6 · Related 4
MGASA-2018-0369RHSA-2019:2079SUSE-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

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

0.00 pp

From 0.45% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.45%

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< 0.4.1-0ubuntu1.1 | < 0.5.0-1ubuntu2.1 | < 0.8.0-1ubuntu0.1

4 vendors · 5 products

References

11 links
Show all 11 references