CVEs-PoC/2021/CVE-2021-31916.md

### [CVE-2021-31916](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31916)
![](https://img.shields.io/static/v1?label=Product&message=kernel&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=Kernel%205.12%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-787&color=brightgreen)

### Description

An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.

### POC

#### Reference
- https://github.com/torvalds/linux/commit/4edbe1d7bcffcd6269f3b5eb63f710393ff2ec7a
- https://seclists.org/oss-sec/2021/q1/268

#### Github
No PoCs found on GitHub currently.