8.1

CVE-2018-12386: canonical ubuntu_linux Incorrect Type Conversion or Cast

CVSS: 8.1v3.0HighModified
AliasesUBUNTU-CVE-2018-12386DEBIAN-CVE-2018-12386
Published 18-10-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-12386 is a high (CVSS 8.1) Incorrect Type Conversion or Cast vulnerability in canonical ubuntu_linux. EPSS estimates a 13.42% chance of exploitation in the next 30 days, higher than 96.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.0 (NVD)
EPSS score
13.42%
0%100%
Medium · +0.99 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 10 · Related 6
DSA-4310-1MGASA-2018-0396OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:14572-1RHSA-2018:2881RHSA-2018:2884

Timeline

  1. 18-10-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in register allocation in JavaScript can lead to type confusion, allowing for an arbitrary read and write. This leads to remote code execution inside the sandboxed content process when triggered. This vulnerability affects Firefox ESR < 60.2.2 and Firefox < 62.0.3.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

13.42%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

+0.99 pp

From 12.43% on 21-09-2026

21-09-202621-10-2026
EPSS score
13.42%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.mozilla.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Redhat6 products
Ubuntu4 products
  • firefox< 62.0.3+build1-0ubuntu0.14.04.2 | < 62.0.3+build1-0ubuntu0.16.04.2 | < 62.0.3+build1-0ubuntu0.18.04.1
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • thunderbird< 1:60.4.0+build2-0ubuntu0.14.04.1 | < 1:60.4.0+build2-0ubuntu0.16.04.1 | < 1:60.4.0+build2-0ubuntu0.18.04.1
Debian2 products
Mozilla2 products
  • firefox≥ unspecified, < 62.0.3 | < 60.2.2 | < 62.0.3
  • firefox_esr≥ unspecified, < 60.2.2
Canonical1 product

5 vendors · 15 products

References

14 links
Show all 14 references