CVE-2021-23997

Summary

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.

Affected Software

Weaknesses

• Use-after-free when freeing fonts from cache

ADP Enrichment

CVE Program Container

Additional References

• https://www.mozilla.org/security/advisories/mfsa2021-16/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1701942

References

• https://www.mozilla.org/security/advisories/mfsa2021-16/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1701942

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