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.

Related CVEs

CVE-2021-3507

Key Information

GHSA ID

GHSA-m99h-7jcp-j7w9

Published

May 24, 2022 7:01 PM

Last Modified

September 6, 2022 12:00 AM

CVSS Score

5.0 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: August 1, 2025 6:44 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.