CVE-2021-3735
No fix known EPSS <1%
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.
Products: qemu, debian_linux
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | qemu | no fix |
| Debian 13 | qemu | no fix |
| Debian 14 | qemu | no fix |
| Ubuntu 22.04 LTS | qemu | no fix |
| Ubuntu 24.04 LTS | qemu | no fix |
| Ubuntu 25.10 | qemu | no fix |
| Ubuntu 26.04 LTS | qemu | no fix |
| Ubuntu 26.04 LTS | qemu-hwe | no fix |
| Ubuntu 26.10 | qemu | no fix |
| Ubuntu 26.10 | qemu-hwe | no fix |
| Ubuntu Pro 14.04 LTS | qemu | no fix |
| Ubuntu Pro 16.04 LTS | qemu | no fix |
| Ubuntu Pro 18.04 LTS | qemu | no fix |
| Ubuntu Pro 20.04 LTS | qemu | no fix |