Not rated
CVE-2023-4577 When `UpdateRegExpStatics` attempted to access `initialStringHeap` it could already have been garbage collected prior to…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 117 | earliest → < 117 | 117 |
| Firefox ESR 115.2 | earliest → < 115.2 | 115.2 |
| Thunderbird 115.2 | earliest → < 115.2 | 115.2 |
Other CVEs of Firefox
The 2221 CVEs of Firefox →
CVE-2026-120572
Incorrect boundary conditions in the Layout: Block and Inline component
8.8
High
CVE-2026-118027
Frame poisoning in the Layout component
9.1
Critical
CVE-2026-118024
Use-after-free in the Graphics: Text component
8.8
High
CVE-2026-118026
Invalid pointer in the JavaScript: GC component
8.8
High