CVE-2026-117938
Received Received - Intake

Use-after-free in Firefox Layout Component

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Mozilla Corporation

Description
Use-after-free in the Layout component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-117938
EUVD
EUVD-2026-110969

Affected Vendors & Products

Currently, no data is known.

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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 is a use-after-free vulnerability in Firefox's Layout component. Use-after-free occurs when a program continues to use memory after it has been freed, potentially leading to crashes or arbitrary code execution. It was patched in Firefox 159 and specific Firefox ESR versions.

Impact Analysis

An attacker could exploit this to crash your browser or run malicious code on your system. This might allow them to steal data, install malware, or take control of your device. Users of vulnerable Firefox versions are at risk.

Mitigation Strategies

Update Firefox to version 159 or later, Firefox ESR to version 115.44 or later, or Firefox ESR to version 153.6 or later to address the use-after-free vulnerability in the Layout component.

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