Description
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are multiple issues related to the handling and accessing of guest
memory pages in the viridian code:
1. A NULL pointer dereference in the updating of the reference TSC area.
This is CVE-2025-27466.
2. A NULL pointer dereference by assuming the SIM page is mapped when
a synthetic timer message has to be delivered. This is
CVE-2025-58142.
3. A race in the mapping of the reference TSC page, where a guest can
get Xen to free a page while still present in the guest physical to
machine (p2m) page tables. This is CVE-2025-58143.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Xen | Xen | — | — |
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 | xen | 4.20.2+7-g1badcf5035-1 | — |
| Debian 13 | xen | 4.20.2+7-g1badcf5035-0+deb13u1 | DSA-6068-1 |
| Debian 12 | xen | 4.17.5+72-g01140da4e8-1 | DSA-6068-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | xen | No fix yet | — |
| Ubuntu 26.04 LTS | xen | No fix yet | — |
| Ubuntu 25.10 | xen | No fix yet | — |
| Ubuntu 24.04 LTS | xen | No fix yet | — |
| Ubuntu 22.04 LTS | xen | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | xen | No fix yet | — |
| Ubuntu 18.04 LTS | xen | No fix yet | — |
| Ubuntu 16.04 LTS | xen | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | xen | 4.20.1_04-150700.3.11.1 | SUSE-SU-2025:03172-1 |
| SLES 15 SP6 | xen | 4.18.5_06-150600.3.31.2 | SUSE-SU-2026:0012-1, SUSE-SU-2025:3798-1 |
| SLES 15 SP5 | xen | 4.17.5_12-150500.3.53.1 | SUSE-SU-2025:3797-1 |
| SLES 15 SP4 | xen | 4.16.7_04-150400.4.75.1 | SUSE-SU-2025:3843-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | xen | 4.18.5_08-150600.3.34.2 | SUSE-SU-2026:0012-1 |
| SLES for SAP 15 SP5 | xen | 4.17.5_12-150500.3.53.1 | SUSE-SU-2025:3797-1 |
| SLES for SAP 15 SP4 | xen | 4.16.7_04-150400.4.75.1 | SUSE-SU-2025:3843-1 |
| SLE Micro 5.5 | xen | 4.17.5_12-150500.3.53.1 | SUSE-SU-2025:3797-1 |
| SLE Micro 5.4 | xen | 4.16.7_04-150400.4.75.1 | SUSE-SU-2025:3843-1 |
| SLE Micro 5.3 | xen | 4.16.7_04-150400.4.75.1 | SUSE-SU-2025:3843-1 |
| SLE Micro 5.2 | xen | 4.14.6_28-150300.3.94.1 | SUSE-SU-2026:0303-1 |
| SLE HPC 15 SP5 | xen | 4.17.5_12-150500.3.53.1 | SUSE-SU-2025:3797-1 |
| SLE HPC 15 SP4 | xen | 4.16.7_04-150400.4.75.1 | SUSE-SU-2025:3843-1 |
| SUSE Manager Server LTS 4.3 | xen | 4.16.7_04-150400.4.75.1 | SUSE-SU-2025:3843-1 |
| SUSE Manager Proxy LTS 4.3 | xen | 4.16.7_04-150400.4.75.1 | SUSE-SU-2025:3843-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.20.1_04-1.1 | openSUSE-SU-2025:15547-1 |
| openSUSE Leap 15.6 | xen | 4.18.5_06-150600.3.31.2 | SUSE-SU-2026:0012-1, SUSE-SU-2025:3798-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.20.1-r1 | — |
| Alpine v3.23 | xen | 4.20.1-r1 | — |
| Alpine v3.22 | xen | 4.20.1-r1 | — |
| Alpine v3.21 | xen | 4.19.3-r1 | — |
| Alpine v3.20 | xen | 4.18.5-r2 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.18.5-r2 | — |
Advisories 9
- WID-SEC-2025-2007 Xen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 9, 2026
- openSUSE-SU-2025:15547-1 xen-4.20.1_04-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0303-1 Security update for xen SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0012-1 Security update for xen SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:3843-1 Security update for xen SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03172-1 Security update for xen SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:3797-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:3798-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- DSA-6068-1 xen - security update Debian Security (DSA / DLA) · Dec 2, 2025