CVE-2026-100783
Received Received - Intake

Uninitialized Memory in Firefox Audio/Video Component

Publication date: 2026-09-29

Last updated on: 2026-09-29

Assigner: Mozilla Corporation

Description
Uninitialized memory in the Audio/Video component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

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Meta Information

Published
2026-09-29
Last Modified
2026-09-29
Generated
2026-09-29
AI Q&A
2026-09-29
EPSS Evaluated
N/A
NVD
CVE-2026-100783
EUVD
EUVD-2026-88935

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox 153.4
mozilla firefox 157
mozilla firefox 115.42
mozilla firefox 140.17

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability involves uninitialized memory in the Audio/Video component of Firefox browsers. Uninitialized memory means memory that has not been cleared or set to a default value, which could contain residual data from previous operations. This flaw could potentially allow attackers to access sensitive information or cause unexpected behavior in the affected software.

Impact Analysis

This vulnerability could impact users by allowing unauthorized access to sensitive data, such as passwords or personal information, if exploited. It may also lead to crashes, instability, or unexpected behavior in the browser. Users running vulnerable versions of Firefox are at risk until they update to the patched versions.

Mitigation Strategies

Update Firefox to a fixed version: Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, or Firefox ESR 140.17 or later.

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