Description
When guests are terminated, various pieces of cleanup need carrying out.
The cleaning up of PCI devices which were assigned to guests, and the
associated removal of tracking structures for IRQs used by the devices
occurs relatively early in the process. Unfortunately after that point
the guest about to be terminated could cause its device model (DM) to
re-establish such tracking structures, by having it bind one or more IRQs
anew. While some of those tracking structures would still be cleaned up
later on, at least one would not be.
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 | 4.20.4+39-gf1e1321c87-1 | — |
| Debian 13 | xen | 4.20.4+39-gf1e1321c87-0+deb13u1 | — |
| Debian 12 | xen | 4.17.7+13-g2445b30a44-0+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 | 4.18.6_03-150600.3.56.1 | SUSE-SU-2026:5140-1 |
| SLES 12 SP5 | xen | 4.12.4_74-3.151.1 | SUSE-SU-2026:4089-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | xen | 4.18.6_03-150600.3.56.1 | SUSE-SU-2026:5140-1 |
| SLE Micro 5.5 | xen | 4.17.6_16-150500.3.79.1 | SUSE-SU-2026:4087-1 |
| SLE Micro 5.4 | xen | 4.16.7_14-150400.4.92.1 | SUSE-SU-2026:4088-1 |
| SLE Micro 5.3 | xen | 4.16.7_14-150400.4.92.1 | SUSE-SU-2026:4088-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.22.0_04-1.1 | openSUSE-SU-2026:11738-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.21.2-r1 | — |
| Alpine v3.23 | xen | 4.20.4-r1 | — |
| Alpine v3.22 | xen | 4.20.4-r1 | — |
| Alpine v3.21 | xen | 4.19.6-r1 | — |
Advisories 7
- SUSE-SU-2026:5140-1 Security update for xen SUSE / openSUSE Security Updates · Nov 10, 2026
- WID-SEC-2026-3248 Xen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 9, 2026
- SUSE-SU-2026:4087-1 Security update for xen SUSE / openSUSE Security Updates · Sep 13, 2026
- SUSE-SU-2026:4088-1 Security update for xen SUSE / openSUSE Security Updates · Sep 13, 2026
- SUSE-SU-2026:4089-1 Security update for xen SUSE / openSUSE Security Updates · Sep 13, 2026
- SUSE-SU-2026:4090-1 Security update for xen SUSE / openSUSE Security Updates · Sep 13, 2026
- openSUSE-SU-2026:11738-1 xen-4.22.0_04-1.1 on GA media SUSE / openSUSE Security Updates · Sep 10, 2026