What’s Vulnerable › Vulnerabilities

CVE-2019-10166

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-08-02 · updated 2026-06-17
• Weakness: CWE-284

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.

Affected products

• Red Hat Enterprise Linux: 7.0, 8.0
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 6.0, 7.0
• libvirt: from 4.0.0 before 4.10.1; from 5.0.0 before 5.4.1 — fixed in 4.10.1, 5.4.1
• RedHat Virtualization: 4.3

How to fix

Upgrade to a fixed version: libvirt 4.10.1, 5.4.1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/libvirt-privesc-vulnerabilities
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10166
• https://security.gentoo.org/glsa/202003-18
• https://access.redhat.com/libvirt-privesc-vulnerabilities
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10166
• https://security.gentoo.org/glsa/202003-18

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