Description
A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This file descriptor allows for privileged operations to happen against the device-mapper on the host. This flaw allows a malicious guest user or process to perform operations outside of their standard permissions, potentially causing serious damage to the host operating system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | libvirt | libvirt 6.6.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libvirt | 6.6.0-1 | — |
| Debian 13 | libvirt | 6.6.0-1 | — |
| Debian 12 | libvirt | 6.6.0-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | SLOF | 20191022-3.git899d9883.module+el8.2.0+5449+efc036dd | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | hivex +6 | 1.3.18-20.module+el8.2.0+5588+63a201c3 | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | libguestfs-winsupport | 8.2-1.module+el8.2.0+5590+82cd80df | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | libiscsi +2 | 1.18.0-8.module+el8.1.0+4066+0f1aadab | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | libnbd +5 | 1.2.2-1.module+el8.2.0+5644+32ac38d4 | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | libtpms +1 | 0.7.0-1.20191018gitdc116933b7.module+el8.2.0+4793+b09dd2fb | RHSA-2020:3586 |
| RHEL 8 | libvirt +28 | 6.0.0-25.2.module+el8.2.1+7722+a9e38cf3 | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | libvirt-dbus | 1.3.0-2.module+el8.2.0+4793+b09dd2fb | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | libvirt-python +1 | 6.0.0-1.module+el8.2.0+5453+31b2b136 | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | nbdkit +13 | 1.16.2-4.module+el8.2.1+6710+effcb1df | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | netcf +2 | 0.2.8-12.module+el8.1.0+4066+0f1aadab | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | perl-Sys-Virt | 6.0.0-1.module+el8.2.0+5488+267def79 | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | python-pyvmomi +1 | 6.7.1-7.module+el8.2.0+4793+b09dd2fb | RHSA-2020:3586 |
| RHEL 8 | qemu-img +10 | 15:4.2.0-29.module+el8.2.1+7712+3c3fe332.2 | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | seabios +2 | 1.13.0-2.module+el8.2.1+7284+aa32a2c4 | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | sgabios +1 | 1:0.20170427git-3.module+el8.1.0+4066+0f1aadab | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | supermin +1 | 5.1.19-10.module+el8.2.0+4793+b09dd2fb | RHSA-2020:4676, RHSA-2020:3586 |
| RHEL 8 | swtpm +3 | 0.2.0-2.20200127gitff5a83b.module+el8.2.0+5579+d71178e0 | RHSA-2020:3586 |
| RHEL 8 | virglrenderer +2 | 0.8.2-1.module+el8.2.0+5777+d9c2af8c | RHSA-2020:3586 |
| RHEL 8 | virt-dib +25 | 1:1.40.2-24.module+el8.2.1+7154+47ffd890 | RHSA-2020:4676, RHSA-2020:3586 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | hivex +6 | 1.3.18-20.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:4676 |
| AlmaLinux 8 | libguestfs-winsupport | 8.2-1.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:4676 |
| AlmaLinux 8 | libiscsi +2 | 1.18.0-8.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:4676 |
| AlmaLinux 8 | libnbd +5 | 1.2.2-1.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:4676 |
| AlmaLinux 8 | libvirt +24 | 6.0.0-28.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:4676 |
| AlmaLinux 8 | libvirt-dbus | 1.3.0-2.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:4676 |
| AlmaLinux 8 | nbdkit +13 | 1.16.2-4.module_el8.5.0+2608+72063365 | ALSA-2020:4676 |
| AlmaLinux 8 | netcf +2 | 0.2.8-12.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:4676 |
| AlmaLinux 8 | ocaml-libguestfs +1 | 1:1.40.2-25.module_el8.3.0+2048+e7a0a3ea.alma | ALSA-2020:4676 |
| AlmaLinux 8 | perl-Sys-Virt +1 | 6.0.0-1.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:4676 |
| AlmaLinux 8 | seabios +2 | 1.13.0-2.module_el8.5.0+2608+72063365 | ALSA-2020:4676 |
| AlmaLinux 8 | sgabios | 1:0.20170427git-3.module_el8.3.0+2048+e7a0a3ea | ALSA-2020:4676 |
| AlmaLinux 8 | sgabios-bin | 1:0.20170427git-3.module_el8.5.0+2608+72063365 | ALSA-2020:4676 |
| AlmaLinux 8 | supermin +1 | 5.1.19-10.module_el8.5.0+2608+72063365 | ALSA-2020:4676 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | hivex | 1.3.18-20.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | libguestfs-winsupport | 8.2-1.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | libiscsi | 1.18.0-8.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | libnbd | 1.2.2-1.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | libvirt-dbus | 1.3.0-2.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | nbdkit | 1.16.2-4.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | netcf | 0.2.8-12.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | perl-Sys-Virt +1 | 6.0.0-1.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | seabios | 1.13.0-2.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | sgabios | 1:0.20170427git-3.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
| Rocky Linux 8 | supermin | 5.1.19-10.module+el8.4.0+534+4680a14e | RLSA-2020:4676 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | libvirt | 6.0.0-13.3.1 | SUSE-SU-2020:2269-1 |
| SLES 15 SP1 | libvirt | 5.1.0-8.19.1 | SUSE-SU-2020:2237-1 |
| SLES 12 SP5 | libvirt | 5.1.0-13.9.1 | SUSE-SU-2020:2233-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | libvirt | 5.1.0-13.9.1 | SUSE-SU-2020:2233-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libvirt | 7.7.0-2.1 | openSUSE-SU-2024:11008-1 |
| openSUSE Leap 15.2 | libvirt | 6.0.0-lp152.9.3.1 | openSUSE-SU-2020:1455-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libvirt | 6.6.0-r0 | — |
| Alpine v3.23 | libvirt | 6.6.0-r0 | — |
| Alpine v3.22 | libvirt | 6.6.0-r0 | — |
| Alpine v3.21 | libvirt | 6.6.0-r0 | — |
| Alpine v3.20 | libvirt | 6.6.0-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libvirt | 6.6.0-r0 | — |
| Alpine v3.18 | libvirt | 6.6.0-r0 | — |
| Alpine v3.17 | libvirt | 6.6.0-r0 | — |
| Alpine v3.16 | libvirt | 6.6.0-r0 | — |
| Alpine v3.15 | libvirt | 6.6.0-r0 | — |
| Alpine v3.14 | libvirt | 6.6.0-r0 | — |
| Alpine v3.13 | libvirt | 6.6.0-r0 | — |
| Alpine v3.12 | libvirt | 6.6.0-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | hivex +6 | 1.3.18-20.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | libguestfs-winsupport | 8.2-1.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | libiscsi +2 | 1.18.0-8.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | libnbd +5 | 1.2.2-1.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | libvirt +28 | 6.0.0-28.0.1.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | libvirt-dbus | 1.3.0-2.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | nbdkit +13 | 1.16.2-4.0.1.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | netcf +2 | 0.2.8-12.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | perl-Sys-Virt +1 | 6.0.0-1.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | qemu-img +10 | 15:4.2.0-34.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | seabios +2 | 1.13.0-2.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | sgabios +1 | 1:0.20170427git-3.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | supermin +1 | 5.1.19-10.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
| Oracle Linux 8 | virt-dib +25 | 1:1.40.2-25.0.1.module+el8.3.0+7860+a7792d29 | ELSA-2020-4676 |
Advisories 11
- ALSA-2020:4676 Moderate: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 5, 2026
- RHSA-2020:4676 Red Hat Security Advisory: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- WID-SEC-2022-1722 QEMU und libvirt: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 8, 2026
- RHSA-2020:3586 Red Hat Security Advisory: virt:8.2 and virt-devel:8.2 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RLSA-2020:4676 Moderate: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2020:2233-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1455-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2237-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11008-1 libvirt-7.7.0-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2269-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2020-4676 Moderate: virt:ol and virt-devel:rhel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1860069
- GLSA-202101-22 vendor-advisory
- GLSA-202210-06 vendor-advisory