cve/2021/CVE-2021-3507.md

### [CVE-2021-3507](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3507)
![](https://img.shields.io/static/v1?label=Product&message=QEMU&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20up%20to%206.0.0%20(including)%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-119&color=brighgreen)

### Description

A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon