A null pointer dereference was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.4, Safari 14.1.1, iOS 14.6 and iPadOS 14.6. A remote attacker may be able to cause a denial of service.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Safari | Apple | * | 14.1.1 (excluding) |
| Ipados | Apple | * | 14.6 (excluding) |
| Iphone_os | Apple | * | 14.6 (excluding) |
| Macos | Apple | 11.0 (including) | 11.4 (excluding) |