RHSA-2026:65516HighCVSS 7.8

Red Hat Security Advisory: libvirt security update

Published
September 8, 2026
Last Modified
September 8, 2026

🔗 CVE IDs covered (1)

CVE-2026-63622 →

📋 Description

CVE-2026-63622 — libvirt: swtpm privilege escalation via symlink following

🎯 Affected products170

  • Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-0:9.0.0-10.16.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-0:9.0.0-10.16.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-0:9.0.0-10.16.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-0:9.0.0-10.16.el9_2.src as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-0:9.0.0-10.16.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-client-0:9.0.0-10.16.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-client-0:9.0.0-10.16.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-client-0:9.0.0-10.16.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-client-0:9.0.0-10.16.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-client-debuginfo-0:9.0.0-10.16.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-client-debuginfo-0:9.0.0-10.16.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-client-debuginfo-0:9.0.0-10.16.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-client-debuginfo-0:9.0.0-10.16.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-0:9.0.0-10.16.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-0:9.0.0-10.16.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-0:9.0.0-10.16.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-0:9.0.0-10.16.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-config-network-0:9.0.0-10.16.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-config-network-0:9.0.0-10.16.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-config-network-0:9.0.0-10.16.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-config-network-0:9.0.0-10.16.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-config-nwfilter-0:9.0.0-10.16.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-config-nwfilter-0:9.0.0-10.16.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-config-nwfilter-0:9.0.0-10.16.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-config-nwfilter-0:9.0.0-10.16.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-debuginfo-0:9.0.0-10.16.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-debuginfo-0:9.0.0-10.16.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-debuginfo-0:9.0.0-10.16.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • libvirt-daemon-debuginfo-0:9.0.0-10.16.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • +140 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: If virtual Trusted Platform Module (vTPM) functionality is not required, remove the <tpm> device definition from the domain XML configuration to prevent the vulnerable code path from being reached. To check if a domain uses vTPM: ``` virsh dumpxml <domain> | grep -A5 '<tpm' ``` To remove it, edit the domain XML and delete the <tpm> block. This prevents libvirt from spawning swtpm processes and from calling virFileChownFiles() on the swtpm state directory during domain startup. Domains that require vTPM for guest OS functionality cannot use this mitigation and should prioritize applying the upstream fix.

🔗 References (4)