CVE-2020-26972

CriticalCVSS 9.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
MozillaFirefox>= unspecified, < 84

References

Timeline

Published
Jan 7, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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