CVE ID:	CVE-2020-26972
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.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2020-26972 https://bugzilla.mozilla.org/show_bug.cgi?id=1671382 https://bugzilla.mozilla.org/show_bug.cgi?id=1671382 https://www.mozilla.org/security/advisories/mfsa2020-54/ https://www.mozilla.org/security/advisories/mfsa2020-54/