6.5

CVE-2024-3855: mozilla firefox Out-of-bounds Read

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2024-3855CGA-53pp-63w6-fjfgCGA-75vh-3wm9-q428
Published 16-04-2024Last modified 12-11-2024
Open JSON

Vulnerability summary

CVE-2024-3855 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in mozilla firefox. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.5% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.40%
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 3 · Related 4
OPENSUSE-SU-2024:13907-1OPENSUSE-SU-2024:14572-1USN-6747-1CGA-4JMW-C59R-PWPR

Timeline

  1. 16-04-2024
    PublishedVulnerability first disclosed.
  2. 12-11-2024
    Last modifiedVulnerability information updated.

Description

In certain cases the JIT incorrectly optimized MSubstr operations, which led to out-of-bounds reads. This vulnerability affects Firefox < 125.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

0.00 pp

From 0.40% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.40%

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

Ubuntu7 products
  • firefox< 125.0.2+build1-0ubuntu0.20.04.2
  • mozjs102All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Chainguard1 product
  • firefox-esr< 125-r0
Mozilla1 product
  • firefox≥ unspecified, < 125 | < 125.0

3 vendors · 9 products

References

6 links