A security issue was found in Firefox before 84.0. 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.
A security issue was found in Firefox before 84.0. 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.
https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26972 https://bugzilla.mozilla.org/show_bug.cgi?id=1671382