CVE-2026-100799

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Uninitialized Memory in Firefox Graphics WebGPU

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

Probability:
Percentile:

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-2026-100799

EUVD

EUVD-2026-88952

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 memory that has not been cleared or set to a default value before use, which can lead to exposure of sensitive data or unexpected behavior.

Detection Guidance

This vulnerability is specific to Firefox's Graphics: WebGPU component and was patched in Firefox 157. Detection would require checking the installed Firefox version and inspecting for uninitialized memory issues in WebGPU. No direct commands are provided in the CVE details.

Impact Analysis

This vulnerability could allow attackers to access sensitive information stored in memory or cause crashes and instability in the Firefox browser. It may also enable arbitrary code execution if exploited.

Compliance Impact

The vulnerability involves uninitialized memory in Firefox's Graphics: WebGPU component, which could potentially lead to information disclosure or other unintended behavior. While the CVSS score suggests limited impact, uninitialized memory issues may raise concerns for compliance with data protection regulations like GDPR or HIPAA if sensitive data is exposed. However, the provided CVE details do not explicitly address compliance implications.

Mitigation Strategies

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

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