---
name: "guestfs-tools-release-notes-1.50"
section: "1"
platform: "linux"
package: "guestfs-tools"
version: "1.56.1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/guestfs-tools-release-notes-1.50"
---

# guestfs-tools-release-notes-1.50(1)

guestfs tools release Notes

## NAME

guestfs-tools-release-notes - guestfs tools release Notes

## RELEASE NOTES FOR GUESTFS TOOLS 1.50

These are the release notes for guestfs tools stable release 1.50. This describes the major changes since 1.48.

Guestfs tools 1.50.0 was released on **7 February 2023**.

### Security

- CVE-2022-2211

  https://bugzilla.redhat.com/show\_bug.cgi?id=2100862

  A buffer overflow was found in the *--key* option of several guestfs tools.  For more information on this low severity bug see the bug report above (Laszlo Ersek).

### New virt-drivers tool

This new tool can examine a disk image to determine:

- •

  Whether it uses BIOS or UEFI for booting

- •

  What bootloader it uses (Linux only)

- •

  What kernels may be chosen at boot time (Linux only)

- •

  What device drivers (kernel modules) are installed

This is useful for determining how (or if) a guest can boot on a virtualization hypervisor.

### virt-customize

*--selinux-relabel* is now the default for SELinux guests.  You no longer need to specify this flag.  In the rare case where you don't want to relabel a guest after customizing it, you can use *--no-selinux-relabel*.  Note this is not needed for non-SELinux guests, it will do the right thing automatically (Laszlo Ersek).

New *--inject-qemu-ga* and *--inject-virtio-win* operations which respectively inject QEMU Guest Agent and virtio-win drivers into Windows guests.

Rocky Linux guests are now supported (thanks Harry Benson).

### virt-inspector

Virt-inspector now outputs the new \<build\_id\> element containing the guest build ID, if using libguestfs ≥ 1.50.

### virt-sysprep

New `"lvm-system-devices"` operation for removing LVM2's *system.devices* file.  This avoids certain problems when cloning a VM (Laszlo Ersek).

Virt-sysprep supports guests using LUKS logical volumes on top of LVM (Laszlo Ersek).

### Common changes

All the tools supporting the *--key* option can now use Clevis/Tang to decrypt full disk encryption using this network-based scheme (Laszlo Ersek).

### Build changes

**Note** that libguestfs now requires minimum OCaml 4.04.  It will not compile on RHEL 6.

**Note** that libosinfo is a new required dependency.

OCaml 4.14 is now supported.

`"./configure --disable-ocaml"` and `"./configure --disable-perl"` now disable the OCaml- and Perl-based tools respectively (thanks Simon Walter).

Experimental support for compiling on macOS.

When running `"make check-valgrind"`, Valgrind logs are no longer written to separate files under *tmp/*.  Instead the output is written to the normal *test-name.log* file.

### Bugs fixed

- https://bugzilla.redhat.com/2133443

  RFE: Support Rocky Linux in virt-customize

- https://bugzilla.redhat.com/2106286

  virt-sysprep: make an effort to support LUKS on LV

- https://bugzilla.redhat.com/2089748

  Removal of "--selinux-relabel" option breaks existing scripts

- https://bugzilla.redhat.com/2075718

  Having to use "--selinux-relabel" is not intuitive given Red Hat products default to selinux enabled.

- https://bugzilla.redhat.com/2072493

  \[RFE\] Request to add lvm system.devices cleanup operation to virt-sysprep

- https://bugzilla.redhat.com/2059545

  \[RHEL 9.0\]\[Nutanix\] lvm partition "home" will lost with SCSI disk either in the new cloned VM or restored from a snapshot

- https://bugzilla.redhat.com/2028764

  Install the qemu-guest-agent package during the conversion process

- https://bugzilla.redhat.com/1809453

  \[RFE\] Add support for LUKS encrypted disks with Clevis & Tang

- https://bugzilla.redhat.com/1554735

  RFE: customize --selinux-relabel should be the default, with --no-selinux-relabel used to opt out

## SEE ALSO

http://libguestfs.org/

## AUTHORS

- Laszlo Ersek

  - Richard W.M. Jones

  ## COPYRIGHT

Copyright (C) 2009-2025 Red Hat Inc.

## LICENSE

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

## BUGS

To get a list of bugs against libguestfs, use this link: https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools

To report a new bug against libguestfs, use this link: https://bugzilla.redhat.com/enter\_bug.cgi?component=libguestfs&product=Virtualization+Tools

When reporting a bug, please supply:

- •

  The version of libguestfs.

- •

  Where you got libguestfs (eg. which Linux distro, compiled from source, etc)

- •

  Describe the bug accurately and give a way to reproduce it.

- •

  Run [**libguestfs-test-tool**(1)](/libguestfs-test-tool/1.md) and paste the **complete, unedited** output into the bug report.