CVE-2026-92029

Received Received - Intake

Use-after-free in Firefox SVG Component

Publication date: 2026-09-15

Last updated on: 2026-09-20

Assigner: Mozilla Corporation

Description

Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-15

Last Modified

2026-09-20

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-92029

EUVD

EUVD-2026-78492

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	156
mozilla	firefox_esr	115.41
mozilla	firefox_esr	140.16
mozilla	firefox_esr	153.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This is a use-after-free vulnerability in the SVG component of Firefox browsers. Use-after-free occurs when a program continues to use a pointer after freeing the memory it points to, potentially leading to crashes or arbitrary code execution.

Detection Guidance

This vulnerability is a use-after-free in Firefox's SVG component, fixed in specific versions. Detection requires checking installed Firefox versions against the patched releases (Firefox 156, ESR 115.41, ESR 140.16, ESR 153.3). Use commands like 'firefox --version' or check package managers (e.g., 'apt list --installed | grep firefox' on Debian/Ubuntu).

Impact Analysis

An attacker could exploit this to crash your browser or run malicious code on your system. This could lead to data theft, system compromise, or further attacks depending on your environment.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The vulnerability involves a use-after-free in the SVG component of Firefox, but no direct impact on regulatory compliance is mentioned.

Mitigation Strategies

Update Firefox to version 156 or later, Firefox ESR to version 115.41 or later, Firefox ESR to version 140.16 or later, or Firefox ESR to version 153.3 or later to address the use-after-free vulnerability in the SVG component.

Hi! I’m here to help you understand CVE-2026-92029. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70