CVE-2021-29952

HIGH

Firefox < 88.0.1 and Firefox for Android < 88.1.3 - Race Condition in Web Render Component Destruction

Title source: llm
STIX 2.1

Description

When Web Render components were destructed, a race condition could have caused undefined behavior, and we presume that with enough effort may have been exploitable to run arbitrary code. This vulnerability affects Firefox < 88.0.1 and Firefox for Android < 88.1.3.

References (2)

Core 2
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2021-20/
Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1704227

Scores

CVSS v3 7.5
EPSS 0.0025
EPSS Percentile 48.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-362
Status published
Products (2)
mozilla/firefox < 88.0.1
mozilla/firefox < 88.1.3
Published Jun 24, 2021
Tracked Since Feb 18, 2026