CVE-2024-3855

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Published Apr 16, 2024 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Description

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

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Mozilla

Firefox

affected

Version	Status	Constraints
`unspecified`	affected	< 125

Configuration 1 [-]

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
Ubuntu USN	USN-6747-1	Firefox vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.398% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=1885828
https://www.mozilla.org/security/advisories/mfsa2024-18/

History

Mar 31, 2025 5:30 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Mozilla Mozilla firefox
CPEs		cpe:2.3:a:mozilla:firefox::::::::
Vendors & Products		Mozilla Mozilla firefox

Nov 12, 2024 7:15 PM Weaknesses updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-125
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Mozilla Firefox

Weaknesses

CWE-125

Sources

CVE record Updated: Nov 12, 2024, 6:09 PM

Status: PUBLISHED
Assigner: mozilla
Published: Apr 16, 2024, 3:14 PM
Updated: Nov 12, 2024, 6:09 PM
Reserved: Apr 15, 2024, 8:26 PM

View source JSON

Vulnrichment Updated: Aug 1, 2024, 8:26 PM

Updated: Aug 1, 2024, 8:26 PM

NVD Updated: Jun 17, 2026, 7:45 AM

Status: Analyzed
Published: Apr 16, 2024, 4:15 PM
Modified: Jun 17, 2026, 7:45 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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