CVE-2025-9181: Uninitialized memory in the JavaScript Engine component

Published Aug 19, 2025
·
Updated

Uninitialized memory in the JavaScript Engine component.

Affected Software

15 affected componentsFixes available
Mozilla Firefox<142
Mozilla Firefox ESR<128.14, <140.2
Mozilla Thunderbird<142
Mozilla Firefox<128.14.0
Mozilla Firefox<142.0
Mozilla Firefox>=140.0<140.2.0
Mozilla Thunderbird<128.14.0
Mozilla Thunderbird<142.0
Mozilla Thunderbird>=140.0<140.2.0
Mozilla Thunderbird<142
142
Mozilla Thunderbird<140.2
140.2
Mozilla Firefox ESR<140.2
140.2
Mozilla Firefox ESR<128.14
128.14
Mozilla Thunderbird<128.14
128.14
Mozilla Firefox<142
142

Event History

Aug 19, 2025
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Updated
via Mozilla·12:00 AM
Affected Software
CVE Published
via MITRE·08:33 PM
Data Sourced
via MITRE·08:33 PM
Description
Data Sourced
via Red Hat·09:02 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·09:15 PM
DescriptionSeverityWeaknessAffected Software
Feb 28, 57989
Event
via FIRST·02:58 AM

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2025-9181?

CVE-2025-9181 is considered a high-severity vulnerability due to the potential for memory corruption.

2

How do I fix CVE-2025-9181?

To fix CVE-2025-9181, users should upgrade to the latest versions of Firefox or Thunderbird that are not affected by this vulnerability.

3

Which versions are affected by CVE-2025-9181?

CVE-2025-9181 affects Firefox versions prior to 142, Firefox ESR versions prior to 128.14 and 140.2, and Thunderbird versions prior to 142.

4

What are the potential impacts of CVE-2025-9181?

The potential impacts of CVE-2025-9181 include unauthorized access to sensitive information and the possibility of remote code execution.

5

Is CVE-2025-9181 specific to any operating systems?

CVE-2025-9181 is not specific to any operating systems but affects the mentioned versions of Mozilla software across various platforms.

Contact

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