CVE-2021-3507

Related Vulnerabilities: CVE-2021-3507  

A heap buffer overflow was found in the floppy disk emulator of QEMU. 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.

Description

A heap buffer overflow was found in the floppy disk emulator of QEMU. 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.

Additional Information

  • Bugzilla 1951118: CVE-2021-3507 QEMU: fdc: heap buffer overflow in DMA read data transfers
  • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
  • FAQ: Frequently asked questions about CVE-2021-3507