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Vulnerability record · CVE-2019-10166 · published 2 August 2019

CVE-2019-10166: Redhat libvirt improper access control vulnerability

Redhat · Libvirt

It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, would permit readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed save state files. If a managed save had already been created by a privileged user, a local attacker could modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.

7.8 CVSS 3.1 High EPSS 0.47% · top 61.9% CWE-284 · Improper access control
7.8CVSS 3.1 base score, v2 4.6
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, would permit readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed save state files. If a managed save had already been created by a privileged user, a local attacker could modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

9 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/libvirt-privesc-vulnerabilities Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10166 Issue TrackingVendor Advisory
https://security.gentoo.org/glsa/202003-18 Third Party Advisory
https://access.redhat.com/libvirt-privesc-vulnerabilities Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10166 Issue TrackingVendor Advisory
https://security.gentoo.org/glsa/202003-18 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-10166), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.