NULL Pointer Dereference Affecting libvirt package, versions <5.0.0-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published7 Aug 2026
- disclosed27 Mar 2019
Introduced: 27 Mar 2019
CVE-2019-3840 (opens in a new tab)How to fix?
Upgrade Echo:latest libvirt to version 5.0.0-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libvirt package and not the libvirt package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 in the way it gets interface information through the QEMU agent. An attacker in a guest VM can use this flaw to crash libvirtd and cause a denial of service.
References
- https://advisory.echohq.com/cve/CVE-2019-3840
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TZRP2BRMI4RYFRPNFTTIAAUOGVN2ORP7/
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00101.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00105.html
- https://access.redhat.com/errata/RHSA-2019:2294
- https://bugzilla.redhat.com/show_bug.cgi?id=1663051
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3840
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZRP2BRMI4RYFRPNFTTIAAUOGVN2ORP7/
- https://www.redhat.com/archives/libvir-list/2019-January/msg00241.html