RHSA-2026:74424 — Security Advisory
Red Hat Security Advisory: libvirt security, bug fix, and enhancement update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · October 2, 2026
Updated · November 4, 2026
Topic
An update for libvirt is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The libvirt library contains a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remote management of virtualized systems.
Security Fix(es):
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libvirt: swtpm privilege escalation via symlink following (CVE-2026-63622)
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libvirt: Integer overflow in NodeGetFreePages RPC handler leading to heap buffer overflow (CVE-2026-18917)
Bug Fix(es) and Enhancement(s):
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Live migration fails when virtio-vga becomes available, video device switches from virtio-gpu-pci to virtio-vga on target [rhel-9.8.z] (JIRA:RHEL-186018)
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libvirt-guests does not work together with virtlockd on shutdown [rhel-9.8.z] (JIRA:RHEL-224986)
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Expose guest-get-devices in libvirt-api [rhel-9.8.z] (JIRA:RHEL-243306)
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allow hyperv pvpanic "device" to process Windows crash dump [rhel-9.8.z] (JIRA:RHEL-242549)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.