CVE-2024-7409

Publication date 5 August 2024

Last updated 15 September 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was found in the QEMU NBD Server. This vulnerability allows a denial of service (DoS) attack via improper synchronization during socket closure when a client keeps a socket open as the server is taken offline.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	25.10 questing	Fixed 1:9.0.2+ds-4ubuntu2
	25.04 plucky	Fixed 1:9.0.2+ds-4ubuntu2
	24.10 oracular	Fixed 1:9.0.2+ds-4ubuntu2
	24.04 LTS noble	Fixed 1:8.2.2+ds-0ubuntu1.10
	22.04 LTS jammy	Fixed 1:6.2+dfsg-2ubuntu6.27
	20.04 LTS focal	Vulnerable
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Vulnerable

Notes

mdeslaur

The changes required to fix this issue in Ubuntu 20.04 LTS and earlier are intrusive and uncovered a regression during QA. For Ubuntu 22.04 LTS and Ubuntu 24.04 LTS, the fix for this issue introduces a backwards-incompatible change and may require changes to libvirt to support passing the max-connections parameter.

Patch details

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

Package	Patch details
qemu	Upstream: fb1c2aa Upstream: c8a76db Upstream: 3e7ef73 Upstream: b9b72cb Upstream: 3874f5f

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H