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CVE-2021-3735

Published: 26 August 2022

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.

Notes

AuthorNote
mdeslaur
as of 2024-02-19, no details on the issue

Priority

Low

Cvss 3 Severity Score

4.4

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
bionic Deferred
(2024-02-19)
focal Deferred
(2024-02-19)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Deferred
(2024-02-19)
kinetic Ignored
(end of life, was deferred [2024-02-19])
lunar Ignored
(end of life, was deferred [2024-02-19])
mantic Deferred
(2024-02-19)
trusty Deferred
(2024-02-19)
upstream Needs triage

xenial Deferred
(2024-02-19)

Severity score breakdown

Parameter Value
Base score 4.4
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H