Firefox Vulnerability Could Lead to Exploitable Crash

CVE-2025-0238

What is CVE-2025-0238?

CVE-2025-0238 is a vulnerability found in the Mozilla Firefox web browser and its Extended Support Release (ESR) versions. This issue allows an attacker to cause a use-after-free error due to a controlled failed memory allocation, which can lead to a crash of the application. This vulnerability could negatively impact organizations by compromising the stability and security of their web browsing experience, potentially exposing users to further attacks if exploited.

Technical Details

The vulnerability affects versions of Firefox earlier than 134 and Firefox ESR versions below 128.6 and 115.19. It arises from improper handling of memory allocation, which can be exploited to create a situation where the application accesses memory that has already been freed. This misuse of memory can result in application crashes, potentially impacting user productivity and system integrity.

Potential Impact of CVE-2025-0238

1. Application Stability: The exploit could lead to crashes in the Firefox browser, disrupting users’ web activities and possibly resulting in lost work or critical interruptions.

2. Security Vulnerability: If exploited, this vulnerability can expose systems to additional threats, especially if a malicious actor can leverage the crash to execute further attacks or deploy malware.

3. User Confidence: Frequent crashes and instability can erode user trust in the browser, prompting organizations to switch to alternative web browsers, which may disrupt workflows and affect user experience.

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