CVE-2021-45464

Publication date 15 April 2023

Last updated 13 April 2026

Ubuntu priority

Cvss 3 Severity Score

Description

kvmtool through 39181fc allows an out-of-bounds write, related to virtio/balloon.c and virtio/pci.c. This allows a guest OS user to execute arbitrary code on the host machine.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
kvmtool	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	Ignored end of life, was needs-triage
	22.04 LTS jammy	Fixed 0.20170904-1.1ubuntu0.1~esm2
	21.10 impish	Ignored end of life
	20.04 LTS focal	Fixed 0.20170904-1ubuntu0.20.04.1~esm1
	18.04 LTS bionic	Fixed 0.20170904-1ubuntu0.18.04.1~esm1
	16.04 LTS xenial	Fixed 0.20151104-1ubuntu0.1~esm1
	14.04 LTS trusty	Ignored end of standard support

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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
kvmtool	Upstream: b98ac59 Upstream: e09b599 Upstream: 143ffa2 Upstream: 06e1e6f Upstream: e473028 Upstream: 31e0eac

Severity score breakdown

Parameter	Value
Base score	8.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-8172-1
kvmtool vulnerabilities
13 April 2026