CVE-2025-43421

Overview

Advisory: Apple Security Advisory

Impact:

Description: Processing maliciously crafted web content may lead to an unexpected process crash

Researchers: Nan Wang (@eternalsakura13)

Attribute	Value
CVE	CVE-2025-43421
Bugzilla	300718
Component	JSC
Bug Class	LogicError
Severity	medium
Commit	56f026944a16a4ba…
Advisory	Apple Advisory

Root Cause Analysis

Multiple issues were addressed by disabling array allocation sinking.

Files Changed

Source Files

• Source/JavaScriptCore/runtime/OptionsList.h