CVE-2021-3507

MEDIUM

QEMU <= 6.0.0 - Heap Buffer Overflow in Floppy Disk Emulator

Title source: llm
STIX 2.1

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.

References (3)

Core 3
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1951118
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210528-0005/
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html

Scores

CVSS v3 6.1
EPSS 0.0003
EPSS Percentile 8.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L

Details

CWE
CWE-119 CWE-787
Status published
Products (3)
debian/debian_linux 10.0
qemu/qemu < 6.0.0
redhat/enterprise_linux 8.0 (2 CPE variants)
Published May 06, 2021
Tracked Since Feb 18, 2026