CVE-2023-4577

Published: Sep 11, 2023

Modified: Dec 18, 2025

PUBLISHED

Description

When `UpdateRegExpStatics` attempted to access `initialStringHeap` it could already have been garbage collected prior to entering the function, which could potentially have led to an exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.

Vendor	Product	Versions
Mozilla	Firefox	affected `unspecified - < 117`
Mozilla	Firefox ESR	affected `unspecified - < 115.2`
Mozilla	Thunderbird	affected `unspecified - < 115.2`

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1847397

https://www.mozilla.org/security/advisories/mfsa2023-34/

https://www.mozilla.org/security/advisories/mfsa2023-36/

https://www.mozilla.org/security/advisories/mfsa2023-38/

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CVE-2023-4577

Description

Affected Products

References