CVE-2021-3735

Publication date 26 August 2022

Last updated 11 November 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

4.4 · Medium

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
qemu 24.10 oracular
Vulnerable, fix deferred
24.04 LTS noble
Vulnerable, fix deferred
23.10 mantic Ignored end of life, was deferred
23.04 lunar Ignored end of life, was deferred
22.10 kinetic Ignored end of life, was deferred
22.04 LTS jammy
Vulnerable, fix deferred
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.04 LTS focal
Vulnerable, fix deferred
18.04 LTS bionic
Vulnerable, fix deferred
16.04 LTS xenial
Vulnerable, fix deferred
14.04 LTS trusty Ignored end of ESM support, was deferred

Notes

mdeslaur

as of 2024-07-18, no details on the issue

bruce-cable

as of 2024-11-11, no details on the issue

Severity score breakdown

Parameter Value
Base score 4.4 · Medium
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