CVE-2021-3735 Information

Description

A deadlock issue was found in the AHCI controller device of QEMU. It occurs on a software reset (ahci_reset_port) while handling a host-to-device Register FIS (Frame Information Structure) packet from the guest. A privileged user inside the guest could use this flaw to hang the QEMU process on the host resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.

Reference

https://access.redhat.com/security/cve/CVE-2021-3735 https://security-tracker.debian.org/tracker/CVE-2021-3735 https://bugzilla.redhat.com/show_bug.cgi?id=1997184