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CVE-2021-38498 During process shutdown, a document could have caused a use-after-free of a languages service object, leading to…

Description

During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.

Affected products and versions

Product Affected versions Fixed in
Firefox 93 earliest → < 93 93
Thunderbird 91.2 earliest → < 91.2 91.2
Firefox ESR 91.2 earliest → < 91.2 91.2

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