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CVE-2023-4577

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.

POC

Reference

No PoCs from references.

Github

- https://github.com/5211-yx/javascript_fuzzer

- https://github.com/TimerIzaya/fuzzilli-plus

- https://github.com/TimerIzaya/izayailli

- https://github.com/googleprojectzero/fuzzilli

- https://github.com/zhangjiahui-buaa/MasterThesis