CVE-2021-3392: Debian Linux

Low severity, CVSS 3.2. EPSS: 0.5% chance of exploitation in the next 30 days.

A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 33 only
• Qemu Qemu: from 2.10.0, up to and including 5.2.0

Published 2021-03-23. Last modified 2026-06-17.