Linux · SUSE Linux Enterprise · Security advisory · January 5, 2026

SUSE-SU-2026:0012-1: xen security update

SUSE-SU-2026:0012-1, released January 5, 2026, fixes 6 CVEs in xen (version 4.18.5_08-150600.3.34.2). None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

3 rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0049

42nd percentile

Priority of the 6 CVEs

Patch now 0
                                Urgent 3
                                High 3
                                Routine 0

Fixed package versions

Product	Release	Fixed in
xen	opensuse-leap 15.6	4.18.5_08-150600.3.34.2
xen	sles 15.6	4.18.5_08-150600.3.34.2

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Urgent	CVE-2025-27466	xen: NULL pointer dereference in the Viridian interface when updating the reference TSC area (bsc#1248807).	9.8	0.0049	None reported
Urgent	CVE-2025-58142	xen: NULL pointer dereference in the Viridian interface due to assumption that the SIM page is mapped when	9.8	0.0049	None reported
Urgent	CVE-2025-58143	xen: information leak and reference counter underflow in the Viridian interface due to race in the mapping	9.8	0.0038	None reported
High	CVE-2025-58149	xen: incorrect removal of permissions on PCI device unplug allows PV guests to access memory of devices no	7.5	0.0044	None reported
High	CVE-2025-58147	xen: incorrect input sanitisation in Viridian hypercalls using the HV_VP_SET Sparse format can lead to	7.5	0.0038	None reported
High	CVE-2025-58148	xen: incorrect input sanitisation in Viridian hypercalls using any input format can lead to out-of-bounds	7.5	0.0038	None reported

Also fixes CVE-2025-58142

SUSE-SU-2025:03172-1
xen on sles 15.7
DEBIAN-CVE-2025-58142
xen on Debian 12.15 (bookworm), Debian 13.5 (trixie), Debian 14

Vendor advisory

https://osv.dev/vulnerability/SUSE-SU-2026:0012-1

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