Description
HVM guest I/O port accesses are subject to either emulation or at least
translation. Translations are managed by the device model (via
XEN_DOMCTL_ioport_mapping), and hence the linked list used may changed
at any time. Traversal of those lists (while handling guest I/O port
accesses) therefore needs synchronizing with updates, which was missing
so far.
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 | 4.20.3+127-gc42374a105-1 | — |
| Debian 13 | xen | 4.20.3+127-gc42374a105-0+deb13u1 | — |
| Debian 12 | xen | 4.17.7-0+deb12u1 | — |
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 | 4.20.3_06-150700.3.41.1 | SUSE-SU-2026:2364-1 |
| SLES 15 SP6 | xen | 4.18.5_18-150600.3.50.1 | SUSE-SU-2026:2329-1 |
| SLES 15 SP5 | xen | 4.17.6_12-150500.3.73.1 | SUSE-SU-2026:2328-1 |
| SLES 15 SP4 | xen | 4.16.7_10-150400.4.86.2 | SUSE-SU-2026:2613-1 |
| SLES 12 SP5 | xen | 4.12.4_70-3.145.1 | SUSE-SU-2026:2668-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | xen | 4.18.5_18-150600.3.50.1 | SUSE-SU-2026:2329-1 |
| SLES for SAP 15 SP5 | xen | 4.17.6_12-150500.3.73.1 | SUSE-SU-2026:2328-1 |
| SLES for SAP 15 SP4 | xen | 4.16.7_10-150400.4.86.2 | SUSE-SU-2026:2613-1 |
| SLE Micro 5.5 | xen | 4.17.6_12-150500.3.73.1 | SUSE-SU-2026:2328-1 |
| SLE Micro 5.4 | xen | 4.16.7_10-150400.4.86.2 | SUSE-SU-2026:2613-1 |
| SLE Micro 5.3 | xen | 4.16.7_10-150400.4.86.2 | SUSE-SU-2026:2613-1 |
| SLE HPC 15 SP5 | xen | 4.17.6_12-150500.3.73.1 | SUSE-SU-2026:2328-1 |
| SLE HPC 15 SP4 | xen | 4.16.7_10-150400.4.86.2 | SUSE-SU-2026:2613-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.21.1-r6 | — |
| Alpine v3.23 | xen | 4.20.3-r4 | — |
| Alpine v3.22 | xen | 4.20.3-r4 | — |
| Alpine v3.21 | xen | 4.19.5-r4 | — |
| Alpine v3.20 | xen | 4.18.5-r9 | — |
Advisories 6
- WID-SEC-2026-1851 Xen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 4, 2026
- SUSE-SU-2026:2668-1 Security update for xen SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:2613-1 Security update for xen SUSE / openSUSE Security Updates · Jun 25, 2026
- SUSE-SU-2026:2364-1 Security update for xen SUSE / openSUSE Security Updates · Jun 12, 2026
- SUSE-SU-2026:2328-1 Security update for xen SUSE / openSUSE Security Updates · Jun 10, 2026
- SUSE-SU-2026:2329-1 Security update for xen SUSE / openSUSE Security Updates · Jun 10, 2026