---
id: CVE-2025-3608
title: >-
  A race condition existed in nsHttpTransaction that could have been exploited
  to cause memory corruption, potentially leading to an exploitable condition
summary: >-
  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.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-362
vendor: mozilla
product: firefox
affected:
  - firefox < 137.0.2
patched:
  - firefox 137.0.2
published: '2025-04-15'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T19:10:01.007'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-3608'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1951554'
    label: security@mozilla.org
  - url: 'https://www.cve.org/CVERecord?id=CVE-2025-3608'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2025-25/'
    label: security@mozilla.org
tags:
  - nvd
epss: 0.00315
epssPercentile: 0.22074
ingestedAt: '2026-09-30T19:21:07.232Z'
---

## Overview

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.

## Affected

- `firefox < 137.0.2`

## Remediation

Upgrade past the affected range:

- `firefox 137.0.2`