Xen: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen
WID-SEC-2025-2409 · first 27.10.2025 · updated 06.02.2026 · CVSS 9,8
What it is about
Xen ist ein Virtueller-Maschinen-Monitor (VMM), der Hardware (x86, IA-64, PowerPC) für die darauf laufenden Systeme (Domains) paravirtualisiert. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Xen ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- Sicherheitsvorkehrungen zu umgehen
Am I affected?
Affected according to the BSI:
- Debian Linux
- SUSE Linux
- SUSE openSUSE
- Open Source Xen <xsa476-4.17.patch
- Open Source Xen <xsa476-4.20.patch
- Open Source Xen <xsa476.patch
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Xen xsa476-4.17.patch
- Open Source Xen xsa476-4.20.patch
- Open Source Xen xsa476.patch
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Xen Security Advisory vom 2025-10-26 xenbits.xen.org
- openSUSE Security Update OPENSUSE-SU-2025:15719-1 vom 2025-11-09 lists.opensuse.org
- Debian Security Advisory DSA-6068 vom 2025-12-03 lists.debian.org
- SUSE Security Update SUSE-SU-2025:4419-1 vom 2025-12-17 lists.suse.com
- SUSE Security Update SUSE-SU-2025:4490-1 vom 2025-12-19 lists.opensuse.org
- SUSE Security Update SUSE-SU-2026:0012-1 vom 2026-01-05 lists.suse.com
- SUSE Security Update SUSE-SU-2026:0303-1 vom 2026-01-28 lists.suse.com
- SUSE Security Update SUSE-SU-2026:0328-1 vom 2026-01-29 lists.suse.com
- SUSE Security Update SUSE-SU-2026:0394-1 vom 2026-02-05 lists.suse.com
CVE: CVE-2025-58149
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.