Upstream information
Description
In the Linux kernel, the following vulnerability has been resolved:xen/privcmd: restrict usage in unprivileged domU
The Xen privcmd driver allows to issue arbitrary hypercalls from
user space processes. This is normally no problem, as access is
usually limited to root and the hypervisor will deny any hypercalls
affecting other domains.
In case the guest is booted using secure boot, however, the privcmd
driver would be enabling a root user process to modify e.g. kernel
memory contents, thus breaking the secure boot feature.
The only known case where an unprivileged domU is really needing to
use the privcmd driver is the case when it is acting as the device
model for another guest. In this case all hypercalls issued via the
privcmd driver will target that other guest.
Fortunately the privcmd driver can already be locked down to allow
only hypercalls targeting a specific domain, but this mode can be
activated from user land only today.
The target domain can be obtained from Xenstore, so when not running
in dom0 restrict the privcmd driver to that target domain from the
beginning, resolving the potential problem of breaking secure boot.
This is XSA-482
---
V2:
- defer reading from Xenstore if Xenstore isn't ready yet (Jan Beulich)
- wait in open() if target domain isn't known yet
- issue message in case no target domain found (Jan Beulich)
SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
Note from the SUSE Security Team on the xen package
This issue likely only affects the XEN hypervisor itself, unless otherwise stated. The userland utilities in -tools and libraries in -libs are shipped together with the xen hypervisor as they are built from one source and do not contain hypervisor specific fixes. SUSE Bugzilla entry: 1259707 [NEW] No SUSE Security Announcements cross referenced.Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | xen | Not affected |
| SUSE Linux Enterprise Micro 5.2 | xen | Not affected |
| SUSE Linux Enterprise Micro 5.3 | xen | Not affected |
| SUSE Linux Enterprise Micro 5.4 | xen | Not affected |
| SUSE Linux Enterprise Micro 5.5 | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | xen | Not affected |
| openSUSE Leap 15.6 | xen | Not affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP5 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP5 | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | xen | Not affected |
| SUSE Manager Proxy 4.3 | xen | Not affected |
| SUSE Manager Proxy LTS 4.3 | xen | Not affected |
| SUSE Manager Retail Branch Server 4.3 | xen | Not affected |
| SUSE Manager Retail Branch Server LTS 4.3 | xen | Not affected |
| SUSE Manager Server 4.3 | xen | Not affected |
| SUSE Manager Server LTS 4.3 | xen | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| HPE Helion OpenStack 8 | xen | Not affected |
| SUSE CaaS Platform 3.0 | xen | Not affected |
| SUSE CaaS Platform 4.0 | xen | Not affected |
| SUSE Enterprise Storage 6 | xen | Not affected |
| SUSE Enterprise Storage 7 | xen | Not affected |
| SUSE Enterprise Storage 7.1 | xen | Not affected |
| SUSE Linux Enterprise Desktop 12 SP2 | xen | Not affected |
| SUSE Linux Enterprise Desktop 12 SP3 | xen | Not affected |
| SUSE Linux Enterprise Desktop 12 SP4 | xen | Not affected |
| SUSE Linux Enterprise Desktop 15 SP1 | xen | Not affected |
| SUSE Linux Enterprise Desktop 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Desktop 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Desktop 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Desktop 15 SP5 | xen | Not affected |
| SUSE Linux Enterprise Desktop 15 SP6 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | xen | Not affected |
| SUSE Linux Enterprise Micro 5.0 | xen | Not affected |
| SUSE Linux Enterprise Micro 5.1 | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT | xen | Not affected |
| SUSE Linux Enterprise Real Time 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Real Time 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP2 | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP2-BCL | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP2-ESPOS | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP2-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP3 | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP3-BCL | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP3-ESPOS | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP3-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP4 | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP4-ESPOS | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP4-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP1 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | xen | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP2 | xen | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP3 | xen | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP4 | xen | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | Not affected |
| SUSE Manager Proxy 4.0 | xen | Not affected |
| SUSE Manager Proxy 4.1 | xen | Not affected |
| SUSE Manager Proxy 4.2 | xen | Not affected |
| SUSE Manager Retail Branch Server 4.0 | xen | Not affected |
| SUSE Manager Retail Branch Server 4.1 | xen | Not affected |
| SUSE Manager Retail Branch Server 4.2 | xen | Not affected |
| SUSE Manager Server 4.0 | xen | Not affected |
| SUSE Manager Server 4.1 | xen | Not affected |
| SUSE Manager Server 4.2 | xen | Not affected |
| SUSE OpenStack Cloud 7 | xen | Not affected |
| SUSE OpenStack Cloud 8 | xen | Not affected |
| SUSE OpenStack Cloud 9 | xen | Not affected |
| SUSE OpenStack Cloud Crowbar 8 | xen | Not affected |
| SUSE OpenStack Cloud Crowbar 9 | xen | Not affected |
| openSUSE Leap 15.3 | xen | Not affected |
| openSUSE Leap 15.4 | xen | Not affected |
| openSUSE Leap 15.5 | xen | Not affected |
| openSUSE Leap Micro 5.2 | xen | Not affected |
| openSUSE Leap Micro 5.3 | xen | Not affected |
| openSUSE Leap Micro 5.4 | xen | Not affected |
| openSUSE Leap Micro 5.5 | xen | Not affected |
SUSE Timeline for this CVE
CVE page created: Mon Mar 16 15:15:11 2026CVE page last modified: Wed Mar 25 14:48:17 2026