CVE-2026-100802

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WebGPU Uninitialized Memory in Firefox

Publication date: 2026-09-29

Last updated on: 2026-09-30

Assigner: Mozilla Corporation

Description

Uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-29

Last Modified

2026-09-30

Generated

2026-10-19

AI Q&A

2026-09-29

EPSS Evaluated

2026-10-18

NVD

CVE-2026-100802

EUVD

EUVD-2026-88955

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	157

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-457	The code uses a variable that has not been initialized, leading to unpredictable or unintended results.

Attack-Flow Graph

Executive Summary

This vulnerability involves uninitialized memory in the Graphics: WebGPU component of Firefox. Uninitialized memory means the software uses memory that hasn't been cleared or set to a default value, which could expose sensitive data or cause unexpected behavior.

Detection Guidance

This vulnerability is specific to Firefox's Graphics: WebGPU component and was fixed in Firefox 157. To detect it, check your Firefox version by running 'firefox --version' in the terminal. If your version is below 157, the system is vulnerable. Update Firefox to version 157 or later to remediate.

Impact Analysis

An attacker could exploit this to read sensitive data from memory, crash the browser, or potentially execute arbitrary code. Users running vulnerable versions of Firefox may be at risk of data leaks or system compromise.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating GDPR's data protection requirements or HIPAA's safeguards for protected health information. Organizations must ensure affected systems are patched to maintain compliance.

Mitigation Strategies

Update Firefox to version 157 or later to address the uninitialized memory issue in the Graphics: WebGPU component.

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