CVE-2021-3392

Publication date 23 March 2021

Last updated 18 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

3.2 · Low

Score breakdown

Description

A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.

Status

Package Ubuntu Release Status
qemu 25.10 questing
Fixed 1:6.0+dfsg-1~ubuntu3
25.04 plucky
Fixed 1:6.0+dfsg-1~ubuntu3
24.10 oracular
Fixed 1:6.0+dfsg-1~ubuntu3
24.04 LTS noble
Fixed 1:6.0+dfsg-1~ubuntu3
23.10 mantic
Fixed 1:6.0+dfsg-1~ubuntu3
23.04 lunar
Fixed 1:6.0+dfsg-1~ubuntu3
22.10 kinetic
Fixed 1:6.0+dfsg-1~ubuntu3
22.04 LTS jammy
Fixed 1:6.0+dfsg-1~ubuntu3
21.10 impish
Fixed 1:6.0+dfsg-1~ubuntu3
21.04 hirsute
Fixed 1:5.2+dfsg-9ubuntu3.1
20.10 groovy
Fixed 1:5.0-5ubuntu9.9
20.04 LTS focal
Fixed 1:4.2-3ubuntu6.17
18.04 LTS bionic
Fixed 1:2.11+dfsg-1ubuntu7.37
16.04 LTS xenial
Vulnerable
14.04 LTS trusty
Vulnerable
qemu-kvm 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

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

References

Related Ubuntu Security Notices (USN)

Other references