CVE-2020-26972

CRITICAL

Firefox < 84.0 - Use-After-Free in WebGL IPC Actor

Title source: llm
STIX 2.1

Description

The lifecycle of IPC Actors allows managed actors to outlive their manager actors; and the former must ensure that they are not attempting to use a dead actor they have a reference to. Such a check was omitted in WebGL, resulting in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 84.

References (2)

Core 2
Core References
Permissions Required x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1671382

Scores

CVSS v3 9.8
EPSS 0.0052
EPSS Percentile 66.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-416
Status published
Products (1)
mozilla/firefox < 84.0
Published Jan 07, 2021
Tracked Since Feb 18, 2026