7.4

CVE-2024-6603: mozilla firefox Use of Out-of-range Pointer Offset

CVSS: 7.4v3.1HighAnalyzed
AliasesUBUNTU-CVE-2024-6603DEBIAN-CVE-2024-6603CGA-h4w9-r4cj-944w
Published 09-07-2024Last modified 30-10-2025
Open JSON

Vulnerability summary

CVE-2024-6603 is a high (CVSS 7.4) Use of Out-of-range Pointer Offset vulnerability in mozilla firefox. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.54%
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 32 · Related 14
DSA-5727-1DSA-5733-1MGASA-2024-0269MGASA-2024-0274OPENSUSE-SU-2024:14189-1OPENSUSE-SU-2024:14197-1

Timeline

  1. 09-07-2024
    PublishedVulnerability first disclosed.
  2. 30-10-2025
    Last modifiedVulnerability information updated.

Description

In an out-of-memory scenario an allocation could fail but free would have been called on the pointer afterwards leading to memory corruption. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.54%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

0.00 pp

From 0.54% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.54%

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

Ubuntu8 products
  • firefox< 128.0+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)
Mozilla3 products
  • firefox≥ unspecified, < 128 | < 115.13 | < 128.0
  • firefox_esr≥ unspecified, < 115.13
  • thunderbird≥ unspecified, < 115.13 | ≥ unspecified, < 128 | < 115.13 | ≥ 116.0, < 128.0
Chainguard2 products
  • firefox< 128.0-r0
  • firefox-esr< 128.0-r0
Debian2 products
  • firefox-esr< 115.13.0esr-1~deb12u1 | < 115.13.0esr-1
  • thunderbird< 1:115.13.0-1~deb12u1 | < 1:115.13.0-1
Wolfi1 product
  • firefox< 128.0-r0

5 vendors · 16 products

References

12 links
Show all 12 references