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CVE-2021-23997

High

Description

Due to unexpected data type conversions, a use-after-free could have occurred when interacting with the font cache. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox < 88.

SeverityHigh
CVSS8.8
Exploit probability—
ProductMozilla Firefox
PublishedJun 24, 2021
First seenJun 24, 2021

How to fix

Update
  • mozilla firefox88.0 or later

Affected products

ProductAffected versionsFixed in
mozilla firefoxv < 88.088.0

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