8.6

CVE-2024-4771: mozilla firefox Use After Free

CVSS: 8.6v3.1HighAnalyzed
AliasesUBUNTU-CVE-2024-4771CGA-4mxf-5hhp-7xj8CGA-wg9x-7q7q-qpc3
Published 14-05-2024Last modified 01-08-2024
Open JSON

Vulnerability summary

CVE-2024-4771 is a high (CVSS 8.6) Use After Free vulnerability in mozilla firefox. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 43.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (CVE.org)
EPSS score
0.52%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 3 · Related 4
OPENSUSE-SU-2024:13980-1OPENSUSE-SU-2024:14572-1USN-6779-1CGA-PHX6-76HF-XQJQ

Timeline

  1. 14-05-2024
    PublishedVulnerability first disclosed.
  2. 01-08-2024
    Last modifiedVulnerability information updated.

Description

A memory allocation check was missing which would lead to a use-after-free if the allocation failed. This could have triggered a crash or potentially be leveraged to achieve code execution. This vulnerability affects Firefox < 126.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

0.00 pp

From 0.52% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.52%

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

Ubuntu7 products
  • firefox< 126.0+build2-0ubuntu0.20.04.1
  • mozjs102All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Chainguard1 product
  • firefox-esr< 126-r0
Mozilla1 product
  • firefox≥ unspecified, < 126 | < 126.0

3 vendors · 9 products

References

6 links