Released November 3, 2025
CVE-2025-43443
CVSS 4.3
severity medium
vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Overview
Impact:
Description: Processing maliciously crafted web content may lead to an unexpected process crash
Researchers: an anonymous researcher
Background
Advisory: Apple Security Advisory
| Attribute | Value |
|---|---|
| CVE | CVE-2025-43443 |
| Bugzilla | 299843 |
| Component | WebKit |
| Bug Class | LogicError |
| Severity | medium |
| Advisory | Apple Advisory |
Fix not public. The WebKit fix for this bug is embargoed or not yet disclosed. The bug ID is confirmed from the Apple advisory, but no public commit references it.
Root Cause Analysis
This issue was addressed with improved checks.
Audit Directions
When auditing for this vulnerability, focus on: (1) similar patterns in the patched functions and nearby code, (2) missing or insufficient bounds checks on user-controlled input, (3) unvalidated type conversions and pointer arithmetic, (4) edge cases not exercised by tests, and (5) copy-paste variants of the vulnerable logic elsewhere.