Alerts This Week
Warning Icon 1 717
Alerts This Week
Warning Icon 1 717

Ubuntu 22.04 LTS kvmtool Severe DoS RCE Security Flaw USN-8172-1

ubuntu
Calendar Grey April 13, 2026
Dist Ubuntu Esm H88
Several security issues in kvmtool for Ubuntu were resolved, highlighting critical fixes for different LTS releases.
Several security issues were fixed in kvmtool.

Summary

Several security issues were fixed in kvmtool.

Software Description:

- kvmtool: Native Linux KVM tool

Details:

It was discovered that kvmtool did not properly manage memory under certain

circumstances. A malicious guest attacker could use this issue to cause

kvmtool to crash, leading to a denial of service, or possibly execute

arbitrary code on the host system. (CVE-2021-45464)

It was discovered that kvmtool incorrectly handled the 9p passthrough file

system. A malicious guest attacker could possibly use this issue to open

special files, escape the exported 9p tree, and execute arbitrary code on

the host system. (CVE-2023-2861)

Topics%20covered

Topics Covered

security advisory denial of service critical remote code execution Ubuntu kvmtool

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
  kvmtool                         0.20170904-1.1ubuntu0.1~esm2
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  kvmtool                         0.20170904-1ubuntu0.20.04.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  kvmtool                         0.20170904-1ubuntu0.18.04.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  kvmtool                         0.20151104-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8172-1

CVE-2021-45464, CVE-2023-2861

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8172-1

Topics%20covered

Topics Covered

security advisory denial of service critical remote code execution Ubuntu kvmtool

Package Information

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here