Description
A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause libvirtd on the host to deadlock or crash, resulting in a denial of service condition.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | libvirt | libvirt 2.33.0 | — |
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 | 7.10.0-2 | — |
| Debian 13 | libvirt | 7.10.0-2 | — |
| Debian 12 | libvirt | 7.10.0-2 | — |
| Debian 10 | libvirt | 5.0.0-4+deb10u2 | DLA-3778-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libvirt | 12.0.0-1ubuntu5.3 | USN-8652-1 |
| Ubuntu 24.04 LTS | libvirt | 10.0.0-2ubuntu8.16 | USN-8652-1 |
| Ubuntu 22.04 LTS | libvirt | 8.0.0-1ubuntu7.19 | USN-8652-1 |
| Ubuntu 20.04 LTS | libvirt | 6.0.0-0ubuntu8.16 | USN-5399-1 |
| Ubuntu 18.04 LTS | libvirt | 4.0.0-1ubuntu8.21 | USN-5399-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | libvirt | 6.0.0-0ubuntu8.20+esm1 | USN-8652-1 |
| Ubuntu Pro 18.04 LTS | libvirt | 4.0.0-1ubuntu8.21+esm1 | USN-8652-1 |
| Ubuntu Pro 16.04 LTS | libvirt | 1.3.1-1ubuntu10.31+esm1 | USN-8652-1 |
| Ubuntu Pro 14.04 LTS | libvirt | 1.2.2-0ubuntu13.1.28+esm2 | USN-8652-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | libvirt | 7.1.0-6.11.1 | SUSE-SU-2022:0021-1 |
| SLES 15 SP2 | libvirt | 6.0.0-13.24.1 | SUSE-SU-2022:0045-1 |
| SLES 15 SP1 | libvirt | 5.1.0-17.1 | SUSE-SU-2022:0128-1 |
| SLES 15 | libvirt | 4.0.0-9.40.1 | SUSE-SU-2022:0031-1 |
| SLES 12 SP5 | libvirt | 5.1.0-13.28.2 | SUSE-SU-2022:0032-1 |
Show 24 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | libvirt | 4.0.0-8.26.1 | SUSE-SU-2022:0042-1 |
| SLES 12 SP3 | libvirt | 3.3.0-5.49.1 | SUSE-SU-2022:0041-1 |
| SLES for SAP 15 SP2 | libvirt | 6.0.0-13.24.1 | SUSE-SU-2022:0045-1 |
| SLES for SAP 15 SP1 | libvirt | 5.1.0-17.1 | SUSE-SU-2022:0128-1 |
| SLES for SAP 15 | libvirt | 4.0.0-9.40.1 | SUSE-SU-2022:0031-1 |
| SLES for SAP 12 SP5 | libvirt | 5.1.0-13.28.2 | SUSE-SU-2022:0032-1 |
| SLES for SAP 12 SP4 | libvirt | 4.0.0-8.26.1 | SUSE-SU-2022:0042-1 |
| SLES for SAP 12 SP3 | libvirt | 3.3.0-5.49.1 | SUSE-SU-2022:0041-1 |
| SLE Real Time 15 SP2 | libvirt | 6.0.0-13.24.1 | SUSE-SU-2022:0045-2 |
| SLE Micro 5.1 | libvirt | 7.1.0-6.11.1 | SUSE-SU-2022:0021-1 |
| SLE Micro 5.0 | libvirt | 6.0.0-13.24.1 | SUSE-SU-2022:0045-1 |
| SLE HPC 15 SP2 | libvirt | 6.0.0-13.24.1 | SUSE-SU-2022:0045-1 |
| SLE HPC 15 SP1 | libvirt | 5.1.0-17.1 | SUSE-SU-2022:0128-1 |
| SLE HPC 15 | libvirt | 4.0.0-9.40.1 | SUSE-SU-2022:0031-1 |
| SUSE OpenStack Cloud Crowbar 9 | libvirt | 4.0.0-8.26.1 | SUSE-SU-2022:0042-1 |
| SUSE OpenStack Cloud Crowbar 8 | libvirt | 3.3.0-5.49.1 | SUSE-SU-2022:0041-1 |
| SUSE OpenStack Cloud 9 | libvirt | 4.0.0-8.26.1 | SUSE-SU-2022:0042-1 |
| SUSE OpenStack Cloud 8 | libvirt | 3.3.0-5.49.1 | SUSE-SU-2022:0041-1 |
| SUSE Manager Server 4.1 | libvirt | 6.0.0-13.24.1 | SUSE-SU-2022:0045-1 |
| SUSE Manager Retail Branch Server 4.1 | libvirt | 6.0.0-13.24.1 | SUSE-SU-2022:0045-1 |
| SUSE Manager Proxy 4.1 | libvirt | 6.0.0-13.24.1 | SUSE-SU-2022:0045-1 |
| SUSE HPE Helion OpenStack 8 | libvirt | 3.3.0-5.49.1 | SUSE-SU-2022:0041-1 |
| SUSE Enterprise Storage 7 | libvirt | 6.0.0-13.24.1 | SUSE-SU-2022:0045-1 |
| SUSE Enterprise Storage 6 | libvirt | 5.1.0-17.1 | SUSE-SU-2022:0128-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libvirt | 8.0.0-1.1 | openSUSE-SU-2024:11758-1 |
| openSUSE Leap 15.3 | libvirt | 7.1.0-6.11.1 | openSUSE-SU-2022:0021-1 |
Advisories 13
- USN-8652-1 libvirt vulnerabilities Ubuntu Security Notices (USN) · Aug 20, 2026
- USN-5399-1 libvirt vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3778-1 libvirt - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:0042-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0021-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0032-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0128-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11758-1 libvirt-8.0.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0041-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0045-2 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0021-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0031-1 Security update for libvirt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0045-1 Security update for libvirt SUSE / openSUSE Security Updates · May 2, 2025