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8.8 High

CVE-2024-3854 In some code patterns the JIT incorrectly optimized switch statements and generated code with out-of-bounds-reads

Description

In some code patterns the JIT incorrectly optimized switch statements and generated code with out-of-bounds-reads. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Affected products and versions

Product Affected versions Fixed in
Firefox 125 earliest → < 125 125
Firefox ESR 115.10 earliest → < 115.10 115.10
Thunderbird 115.10 earliest → < 115.10 115.10
firefox_esr 115.10 earliest → < 115.10 115.10

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-2026-118025 Other issue in the SVG component 8.8 High CVE-2026-118026 Invalid pointer in the JavaScript: GC component 8.8 High
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