CVE-2021-3507
6.1 MEDIUMA heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including)
Published: 2021-05-06 · Last updated: 2026-06-17
Severity and scoring
- CVSS
- 6.1 MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
- CWE
- CWE-119, CWE-787
Affected products
| Vendor | Product |
|---|---|
| debian | debian_linux, enterprise_linux, qemu |
| qemu | debian_linux, enterprise_linux, qemu |
| redhat | debian_linux, enterprise_linux, qemu |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-3507
- [Exploit reference]https://bugzilla.redhat.com/show_bug.cgi?id=1951118
- [Other]https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- [Other]https://security.netapp.com/advisory/ntap-20210528-0005/
- [Exploit reference]https://bugzilla.redhat.com/show_bug.cgi?id=1951118
- [Other]https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- [Other]https://security.netapp.com/advisory/ntap-20210528-0005/
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