CVE-2020-35505: Debian Linux

Medium severity, CVSS 4.4. EPSS: 0.3% chance of exploitation in the next 30 days.

A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Affected products

• Debian Debian Linux: version 10.0 only
• Qemu Qemu: before 6.0.0 (fixed in 6.0.0); version 6.0.0 only

Published 2021-05-28. Last modified 2026-06-17.