CVE-2023-4577

Memory corruption in JIT UpdateRegExpStatics

State: Published
Severity: Not scored
Published: Sep 11, 2023
Updated: Dec 18, 2025
Reserved: Aug 29, 2023

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
FirefoxMozilla	before 117Affected
Firefox ESRMozilla	before 115.2Affected
ThunderbirdMozilla	before 115.2Affected

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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