CVE-2026-100806

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Uninitialized Memory in Firefox WebGPU Component

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 Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, 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-2026-100806

EUVD

EUVD-2026-88785

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 153.4 (inc)
mozilla	firefox	157
mozilla	firefox	to 157 (inc)

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 ESR 153.4 and Firefox 157. Detection involves checking the installed Firefox version. If you are running an affected version, update immediately. No specific commands are provided for detection beyond version verification.

Impact Analysis

An attacker could exploit this to read sensitive data from memory, crash the browser, or execute arbitrary code. Users running affected Firefox versions may face stability issues or potential data leaks.

Compliance Impact

This vulnerability involves uninitialized memory in the Graphics: WebGPU component of Firefox. It does not directly impact data confidentiality or integrity, as the CVSS score indicates no unauthorized access or modification of data. However, uninitialized memory could potentially lead to information disclosure if exploited, which may affect compliance with GDPR or HIPAA if sensitive data is involved.

Mitigation Strategies

Update Firefox to version ESR 153.4 or Firefox 157 or later to address the uninitialized memory issue in Graphics: WebGPU.

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