CVE-2025-13022: Mozilla Firefox WebGPU Boundary Flaw

CVE-2025-13022 Overview

CVE-2025-13022 is a boundary condition vulnerability affecting the Graphics: WebGPU component in Mozilla Firefox and Thunderbird. This flaw stems from incorrect boundary conditions that could allow an attacker to exploit the WebGPU graphics processing functionality. Due to the nature of the vulnerability affecting a graphics rendering component, successful exploitation could potentially lead to memory corruption, allowing attackers to execute arbitrary code, access sensitive information, or cause application crashes.

Critical Impact

This vulnerability affects the WebGPU graphics component in Firefox and Thunderbird versions prior to 145. The network-accessible nature of this flaw means attackers can potentially exploit it through malicious web content without requiring any user interaction or authentication.

Affected Products

• Mozilla Firefox versions prior to 145
• Mozilla Thunderbird versions prior to 145
• Systems running vulnerable Firefox or Thunderbird with WebGPU enabled

Discovery Timeline

• 2025-11-11 - CVE-2025-13022 published to NVD
• 2025-11-19 - Last updated in NVD database

Technical Details for CVE-2025-13022

Vulnerability Analysis

The vulnerability resides in Mozilla's implementation of the WebGPU graphics component. WebGPU is a modern web graphics API designed to provide efficient access to GPU capabilities for rendering and computation tasks. The incorrect boundary conditions in this implementation can lead to improper handling of data at memory boundaries, creating exploitable conditions.

This vulnerability is classified under CWE-703 (Improper Check or Handling of Exceptional Conditions), indicating that the software fails to properly handle exceptional boundary scenarios within the graphics processing pipeline. When boundary conditions are not properly validated, it can result in out-of-bounds memory access, buffer overflows, or other memory corruption issues that attackers may leverage to gain control over program execution.

The attack vector is network-based, meaning exploitation can occur through specially crafted web content that triggers the vulnerable code path in the WebGPU component. An attacker could host malicious content on a compromised website or deliver it through other means, potentially achieving code execution within the browser context.

Root Cause

The root cause of this vulnerability lies in the improper validation of boundary conditions within the WebGPU graphics component. When processing graphics data or commands, the component fails to adequately check that values fall within expected ranges before performing memory operations. This oversight allows attackers to manipulate input in ways that cause the application to access memory outside of intended boundaries.

Attack Vector

The attack can be executed remotely over a network connection without requiring any privileges or user interaction. An attacker would need to craft malicious web content that exploits the boundary condition error in the WebGPU component. When a victim visits a webpage containing the malicious content, their browser processes the graphics commands, triggering the vulnerability.

The WebGPU API provides significant access to GPU resources for web applications. By exploiting improper boundary checking in this component, attackers can potentially:

1. Corrupt adjacent memory regions, potentially overwriting critical data structures
2. Execute arbitrary code within the browser's process context
3. Access sensitive information stored in browser memory
4. Cause denial of service through application crashes

For detailed technical information about this vulnerability, refer to Mozilla Bug Report #1988488 and the Mozilla Security Advisory MFSA-2025-87.

Detection Methods for CVE-2025-13022

Indicators of Compromise

• Unexpected browser crashes when rendering WebGPU content
• Abnormal memory consumption patterns in Firefox or Thunderbird processes
• Suspicious network connections originating from browser processes
• Evidence of code execution attempts following visits to untrusted websites

Detection Strategies

• Monitor for anomalous behavior in Firefox and Thunderbird processes, particularly related to graphics rendering
• Implement network traffic analysis to identify potentially malicious WebGPU-related content
• Deploy endpoint detection and response (EDR) solutions capable of detecting memory corruption exploitation attempts
• Review browser crash reports for patterns consistent with boundary condition exploitation

Monitoring Recommendations

• Enable crash reporting and analyze reports for patterns indicating exploitation attempts
• Implement application behavior monitoring to detect abnormal process activities
• Monitor for unusual GPU utilization patterns that may indicate exploitation
• Deploy web content filtering to block access to known malicious sites

How to Mitigate CVE-2025-13022

Immediate Actions Required

• Update Mozilla Firefox to version 145 or later immediately
• Update Mozilla Thunderbird to version 145 or later immediately
• Implement browser security policies through enterprise management tools
• Consider temporarily disabling WebGPU in Firefox via configuration settings until patches can be applied

Patch Information

Mozilla has released Firefox version 145 and Thunderbird version 145 to address this vulnerability. Organizations and users should update to these versions or later as soon as possible. The security fix is documented in Mozilla Security Advisory MFSA-2025-87 and Mozilla Security Advisory MFSA-2025-90.

To verify your current Firefox version, navigate to Help > About Firefox. Enterprise administrators should use appropriate deployment tools to ensure all managed installations are updated.

Workarounds

• Disable WebGPU functionality in Firefox by setting dom.webgpu.enabled to false in about:config
• Implement network-level filtering to block potentially malicious web content
• Use browser isolation solutions to contain potential exploitation
• Restrict access to untrusted websites until patches can be applied

# Disable WebGPU in Firefox via user.js configuration
# Add the following line to your Firefox profile's user.js file
user_pref("dom.webgpu.enabled", false);

# For enterprise deployments, use policies.json
# Place in Firefox installation directory under distribution folder
# Example: /usr/lib/firefox/distribution/policies.json