VULNERABILITY INTELLIGENCE

CVE-2020-26972

CVSS score9.8 CRITICAL
EPSS probability1.31%
CISA KEVNot currently listed
Published2021-01-07
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • CWE-416: Use After Free

Primary references