CVE-2023-3301

Publication date 13 September 2023

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was found in QEMU. The async nature of hot-unplug enables a race scenario where the net device backend is cleared before the virtio-net pci frontend has been unplugged. A malicious guest could use this time window to trigger an assertion and cause a denial of service.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Fixed 1:7.2+dfsg-5ubuntu2.4
	22.04 LTS jammy	Fixed 1:6.2+dfsg-2ubuntu6.16
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

introduced in 5.1

Patch details

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

Package	Patch details
qemu	Upstream: a0d7215 Upstream: aab37b2

Severity score breakdown

Parameter	Value
Base score	5.6 · Medium
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H