CVE-2021-3507

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.

• CWE-119
• CWE-787

• https://bugzilla.redhat.com/show_bug.cgi?id=1951118Exploit, Issue Tracking, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210528-0005/Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1951118Exploit, Issue Tracking, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210528-0005/Third Party Advisory

Published

May 6, 2021

Last Modified

Jun 17, 2026

Status

Modified

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