### [CVE-2021-30735](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30735)
![](https://img.shields.io/static/v1?label=Product&message=macOS&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2011.4%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%202021%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=An%20out-of-bounds%20write%20issue%20was%20addressed%20with%20improved%20bounds%20checking&color=brighgreen)

### Description

A malicious application may be able to execute arbitrary code with kernel privileges. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. An out-of-bounds write issue was addressed with improved bounds checking.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/houjingyi233/macOS-iOS-system-security
- https://github.com/ret2/Pwn2Own-2021-Safari