Mozilla Firefox up to 124 Garbage Collection use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 124. This affects an unknown part of the component Garbage Collection Handler. The manipulation leads to use after free. This vulnerability is listed as CVE-2024-3853. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 124 and classified as critical. This issue affects an unknown functionality of the component Garbage Collection Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A use-after-free could result if a JavaScript realm was in the process of being initialized when a garbage collection started. This vulnerability affects Firefox < 125.

The advisory is shared at bugzilla.mozilla.org. The identification of this vulnerability is CVE-2024-3853 since 04/15/2024. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/18/2025).

The vulnerability scanner Nessus provides a plugin with the ID 249893 (Linux Distros Unpatched Vulnerability : CVE-2024-3853), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 125 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (249893). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 249893
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2024-3853

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 125

Timelineinfo

04/15/2024 🔍
04/16/2024 +1 days 🔍
04/16/2024 +0 days 🔍
08/18/2025 +489 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2024-3853 (🔍)
GCVE (CVE): GCVE-0-2024-3853
GCVE (VulDB): GCVE-100-260933

Entryinfo

Created: 04/16/2024 19:24
Updated: 08/18/2025 03:16
Changes: 04/16/2024 19:24 (54), 04/01/2025 03:23 (2), 04/05/2025 23:51 (3), 08/18/2025 03:16 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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