Mozilla Firefox up to 137.0.1 nsHttpTransaction race condition

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 137.0.1. It has been rated as problematic. The affected element is the function nsHttpTransaction. This manipulation causes race condition. This vulnerability is tracked as CVE-2025-3608. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Mozilla Firefox up to 137.0.1 and classified as problematic. Affected by this vulnerability is the function nsHttpTransaction. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A race condition existed in nsHttpTransaction that could have been exploited to cause memory corruption, potentially leading to an exploitable condition. This vulnerability was fixed in Firefox 137.0.2.

The advisory is shared at bugzilla.mozilla.org. This vulnerability is known as CVE-2025-3608 since 04/14/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/15/2026).

The vulnerability scanner Nessus provides a plugin with the ID 234434 (Mozilla Firefox < 137.0.2), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 137.0.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (234434). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox

Version

• 137.0.0
• 137.0.1

License

• open-source

Website

• Vendor: https://www.mozilla.org/
• Product: https://www.mozilla.org/en-US/firefox/

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

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Entryinfo

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

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