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.
| Reporter | Title | Published | Views | Family All 113 |
|---|---|---|---|---|
 | CVE-2021-3507 | 6 May 202116:15 | – | attackerkb |
 | AlmaLinux 8 : virt:rhel and virt-devel:rhel (ALSA-2022:7472) | 15 Nov 202200:00 | – | nessus |
| AlmaLinux 9 : qemu-kvm (ALSA-2022:7967) | 19 Nov 202200:00 | – | nessus |
| CentOS 8 : virt:rhel and virt-devel:rhel (CESA-2022:7472) | 9 Nov 202200:00 | – | nessus |
| CentOS 9 : qemu-kvm-7.1.0-2.el9 | 29 Feb 202400:00 | – | nessus |
| Debian dla-3099 : qemu - security update | 5 Sep 202200:00 | – | nessus |
| EulerOS Virtualization 2.9.1 : qemu (EulerOS-SA-2023-1212) | 11 Jan 202300:00 | – | nessus |
| EulerOS Virtualization 2.9.0 : qemu (EulerOS-SA-2023-1242) | 10 Jan 202300:00 | – | nessus |
| EulerOS Virtualization 3.0.2.0 : qemu-kvm (EulerOS-SA-2023-1688) | 7 May 202300:00 | – | nessus |
| EulerOS Virtualization 2.11.1 : qemu (EulerOS-SA-2023-2082) | 7 Jun 202300:00 | – | nessus |
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02 Oct 2025 06:11Current
7High risk
Vulners AI Score7
CVSS 23.6
CVSS 3.16.1
EPSS0.00489