CVE-2021-3930

Publication date 18 February 2022

Last updated 25 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

Description

An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.

Status

Package Ubuntu Release Status
qemu 22.10 kinetic
Fixed 1:6.2+dfsg-2ubuntu5
22.04 LTS jammy
Fixed 1:6.2+dfsg-2ubuntu5
21.10 impish
Fixed 1:6.0+dfsg-2expubuntu1.2
21.04 hirsute Ignored end of life
20.04 LTS focal
Fixed 1:4.2-3ubuntu6.21
18.04 LTS bionic
Fixed 1:2.11+dfsg-1ubuntu7.39
16.04 LTS xenial
Fixed 1:2.5+dfsg-5ubuntu10.51+esm1
14.04 LTS trusty
Fixed 2.0.0+dfsg-2ubuntu1.47+esm2

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
qemu

Severity score breakdown

Parameter Value
Base score 6.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Changed
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references