Release of libvirt-7.5.0

Jiri Denemark jdenemar at
Thu Jul 1 13:48:08 UTC 2021

The 7.5.0 release of both libvirt and libvirt-python is tagged and
signed tarballs and source RPMs are available at

Thanks everybody who helped with this release by sending patches,
reviewing, testing, or providing any other feedback. Your work is
greatly appreciated.

* Security

  * svirt: fix MCS label generation (CVE-2021-3631)

    A flaw in the way MCS labels were generated could result in a VM's
    resource not being fully protected from access by another VM were
    it to be compromised.

* Removed features

  * xen: Remove support for Xen < 4.9

    In accordance with our platform support policy, the oldest supported Xen
    version is now bumped from 4.6 to 4.9.

* Improvements

  * docs: Document disk serial truncation status quo

    Disk ``<serial>`` is being truncated by QEMU before passed to the guest.
    Since it's impossible to fix it without running into further regressions
    the documentation was improved to document the intricacies.

* Bug fixes

  * qemu: Fixed validation of disk ``iothread`` configuration

    The validation of ``iothread`` config was previously moved to a place where
    it caused bogus errors when address wasn't allocated when hotplugging a
    disk. The check is now removed as it wasn't actually necessary at all.



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