Description
Addressing certain issues, in particular related to operations which may
take excessively long and therefore would need preemption, has turned out
overly costly. Since alternatives (HVM/PVH: HAP, PV: shim) are commonly
available, the decision was to deprecate the functionality, while still
retaining it for people to use at their own (security) risk. Memory-wise
small enough guests may still be okay to run.
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 24.04 LTS | xen | No fix yet | — |
| Ubuntu 22.04 LTS | xen | No fix yet | — |
| Ubuntu 20.04 LTS | xen | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | 4.20.4_04-150700.3.46.1 | SUSE-SU-2026:4090-1 |
| SLES 15 SP6 | xen | 4.18.5_20-150600.3.53.3 | SUSE-SU-2026:3409-1 |
| SLES 15 SP5 | xen | 4.17.6_14-150500.3.76.3 | SUSE-SU-2026:3423-1 |
| SLES 15 SP4 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
| SLES 12 SP5 | xen | 4.12.4_72-3.148.4 | SUSE-SU-2026:3451-1 |
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_20-150600.3.53.3 | SUSE-SU-2026:3409-1 |
| SLES for SAP 15 SP5 | xen | 4.17.6_14-150500.3.76.3 | SUSE-SU-2026:3423-1 |
| SLES for SAP 15 SP4 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
| SLE Micro 5.5 | xen | 4.17.6_14-150500.3.76.3 | SUSE-SU-2026:3423-1 |
| SLE Micro 5.4 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
| SLE Micro 5.3 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
| SLE HPC 15 SP5 | xen | 4.17.6_14-150500.3.76.3 | SUSE-SU-2026:3423-1 |
| SLE HPC 15 SP4 | xen | 4.16.7_12-150400.4.89.3 | SUSE-SU-2026:3462-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.22.0_02-1.1 | openSUSE-SU-2026:11441-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.21.2-r0 | — |
| Alpine v3.23 | xen | 4.20.4-r0 | — |
| Alpine v3.22 | xen | 4.20.4-r0 | — |
| Alpine v3.21 | xen | 4.19.6-r0 | — |
Advisories 7
- WID-SEC-2026-2568 Xen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 4, 2026
- SUSE-SU-2026:4090-1 Security update for xen SUSE / openSUSE Security Updates · Sep 13, 2026
- SUSE-SU-2026:3462-1 Security update for xen SUSE / openSUSE Security Updates · Aug 4, 2026
- SUSE-SU-2026:3451-1 Security update for xen SUSE / openSUSE Security Updates · Aug 4, 2026
- openSUSE-SU-2026:11441-1 xen-4.22.0_02-1.1 on GA media SUSE / openSUSE Security Updates · Aug 4, 2026
- SUSE-SU-2026:3409-1 Security update for xen SUSE / openSUSE Security Updates · Jul 30, 2026
- SUSE-SU-2026:3423-1 Security update for xen SUSE / openSUSE Security Updates · Jul 30, 2026