CVE-2021-29952

Published: Jun 24, 2021Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability: 1.6 / Impact: 5.9

Source: NVD

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.

Affected (2)

Products: Mozilla: Firefox

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Mozilla Firefox	Before 88.0.1
Mozilla Firefox	Before 88.1.3

Related CWEs

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

References (4)

https://bugzilla.mozilla.org/show_bug.cgi?id=1704227

Source: security@mozilla.org

Permissions RequiredVendor Advisory

https://www.mozilla.org/security/advisories/mfsa2021-20/

Source: security@mozilla.org

Release NotesVendor Advisory

https://bugzilla.mozilla.org/show_bug.cgi?id=1704227

Source: af854a3a-2127-422b-91ae-364da2661108

Permissions RequiredVendor Advisory

https://www.mozilla.org/security/advisories/mfsa2021-20/

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

Timeline

No history available yet.