8.1

CVE-2018-6307: canonical ubuntu_linux Use After Free

CVSS: 8.1v3.0HighModified
AliasesUBUNTU-CVE-2018-6307DEBIAN-CVE-2018-6307
Published 19-12-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-6307 is a high (CVSS 8.1) Use After Free vulnerability in canonical ubuntu_linux. EPSS estimates a 26.54% chance of exploitation in the next 30 days, higher than 97.9% of scored vulnerabilities.

Overall risk
38/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.0 (NVD)
EPSS score
26.54%
0%100%
High · 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 10 · Related 6
DLA-1617-1DLA-1979-1DSA-4383-1MGASA-2019-0037OPENSUSE-SU-2019:0053-1SUSE-SU-2019:0060-1

Timeline

  1. 19-12-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

LibVNC before commit ca2a5ac02fbbadd0a21fabba779c1ea69173d10b contains heap use-after-free vulnerability in server code of file transfer extension that can result remote code execution.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

26.54%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

0.00 pp

From 26.54% on 18-09-2026

18-09-202618-10-2026
EPSS score
26.54%

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

Debian2 products
Canonical1 product
Libvnc_project1 product
Ubuntu1 product
  • libvncserver< 0.9.9+dfsg-1ubuntu1.4 | < 0.9.10+dfsg-3ubuntu0.16.04.3 | < 0.9.11+dfsg-1ubuntu1.1

4 vendors · 5 products

References

10 links