6.5

CVE-2018-20533: canonical ubuntu_linux NULL Pointer Dereference

CVSS: 6.5v3.0MediumModified
AliasesUBUNTU-CVE-2018-20533DEBIAN-CVE-2018-20533
Published 28-12-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-20533 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 2.08% chance of exploitation in the next 30 days, higher than 81.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.0 (NVD)
EPSS score
2.08%
0%100%
Low · -0.09 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 8 · Related 7
OPENSUSE-SU-2019:1927-1RHSA-2019:2290SUSE-RU-2019:2742-1SUSE-SU-2019:1972-1SUSE-SU-2019:2030-1SUSE-SU-2019:2265-1

Timeline

  1. 28-12-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

There is a NULL pointer dereference at ext/testcase.c (function testcase_str2dep_complex) in libsolvext.a in libsolv through 0.7.2 that will cause a denial of service.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.08%

Chance of exploitation in the next 30 days

Percentile

81%

Versus all other CVEs

30-day change

-0.09 pp

From 2.16% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.08%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.redhat.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Canonical1 product
Debian1 product
  • libsolv< 0.6.36-1
Opensuse1 product
Ubuntu1 product
  • libsolv< 0.6.11-1.1ubuntu0.1~esm1 | < 0.6.30-1ubuntu0.1~esm1

4 vendors · 4 products

References

10 links