CVEs-PoC/2021/CVE-2021-29628.md

### [CVE-2021-29628](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29628)
![](https://img.shields.io/static/v1?label=Product&message=FreeBSD&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Privilege%20Context%20Switching%20Error&color=brighgreen)

### Description

In FreeBSD 13.0-STABLE before n245764-876ffe28796c, 12.2-STABLE before r369857, 13.0-RELEASE before p1, and 12.2-RELEASE before p7, a system call triggering a fault could cause SMAP protections to be disabled for the duration of the system call. This weakness could be combined with other kernel bugs to craft an exploit.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/r3dg0d/pspwn5