Description
In x86's APIC (Advanced Programmable Interrupt Controller) architecture,
error conditions are reported in a status register. Furthermore, the OS
can opt to receive an interrupt when a new error occurs.
It is possible to configure the error interrupt with an illegal vector,
which generates an error when an error interrupt is raised.
This case causes Xen to recurse through vlapic_error(). The recursion
itself is bounded; errors accumulate in the the status register and only
generate an interrupt when a new status bit becomes set.
However, the lock protecting this state in Xen will try to be taken
recursively, and deadlock.
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 | 4.19.1-1 | — |
| Debian 13 | xen | 4.19.1-1 | — |
| Debian 12 | xen | 4.17.5+23-ga4e5191dc0-1 | DSA-5836-1 |
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 SP6 | xen | 4.18.3_04-150600.3.9.1 | SUSE-SU-2024:4163-1, SUSE-SU-2024:3424-1 |
| SLES 15 SP5 | xen | 4.17.5_04-150500.3.39.1 | SUSE-SU-2024:3980-1, SUSE-SU-2024:3421-1 |
| SLES 15 SP4 | xen | 4.16.6_04-150400.4.62.1 | SUSE-SU-2024:3423-1 |
| SLES 15 SP2 | xen | 4.13.5_16-150200.3.99.1 | SUSE-SU-2024:4073-1 |
| SLES 12 SP5 | xen | 4.12.4_54-3.118.1 | SUSE-SU-2024:3586-1, SUSE-SU-2024:3432-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP4 | xen | 4.16.6_04-150400.4.62.1 | SUSE-SU-2024:3423-1 |
| SLES for SAP 15 SP2 | xen | 4.13.5_16-150200.3.99.1 | SUSE-SU-2024:4073-1 |
| SLES for SAP 12 SP5 | xen | 4.12.4_54-3.118.1 | SUSE-SU-2024:3586-1, SUSE-SU-2024:3432-1 |
| SLE Micro 5.5 | xen | 4.17.5_04-150500.3.39.1 | SUSE-SU-2024:3980-1, SUSE-SU-2024:3421-1 |
| SLE Micro 5.4 | xen | 4.16.6_04-150400.4.62.1 | SUSE-SU-2024:3423-1 |
| SLE Micro 5.3 | xen | 4.16.6_04-150400.4.62.1 | SUSE-SU-2024:3423-1 |
| SLE Micro 5.2 | xen | 4.14.6_20-150300.3.81.1 | SUSE-SU-2024:3422-1 |
| SLE Micro 5.1 | xen | 4.14.6_20-150300.3.81.1 | SUSE-SU-2024:3422-1 |
| SLE HPC 15 SP4 | xen | 4.16.6_04-150400.4.62.1 | SUSE-SU-2024:3423-1 |
| SLE HPC 15 SP2 | xen | 4.13.5_16-150200.3.99.1 | SUSE-SU-2024:4073-1 |
| SUSE Manager Server 4.3 | xen | 4.16.6_04-150400.4.62.1 | SUSE-SU-2024:3423-1 |
| SUSE Manager Proxy 4.3 | xen | 4.16.6_04-150400.4.62.1 | SUSE-SU-2024:3423-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.19.0_04-1.1 | openSUSE-SU-2024:14377-1 |
| openSUSE Leap 15.6 | xen | 4.18.3_04-150600.3.9.1 | SUSE-SU-2024:4163-1, SUSE-SU-2024:3424-1 |
| openSUSE Leap 15.5 | xen | 4.17.5_04-150500.3.39.1 | SUSE-SU-2024:3980-1, SUSE-SU-2024:3421-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.5 | xen | 4.17.5_04-150500.3.39.1 | SUSE-SU-2024:3980-1, SUSE-SU-2024:3421-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.19.0-r0 | — |
| Alpine v3.23 | xen | 4.19.0-r0 | — |
| Alpine v3.22 | xen | 4.19.0-r0 | — |
| Alpine v3.21 | xen | 4.19.0-r0 | — |
| Alpine v3.20 | xen | 4.18.3-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.18.3-r0 | — |
| Alpine v3.18 | xen | 4.17.5-r1 | — |
| Alpine v3.17 | xen | 4.16.6-r2 | — |
Advisories 12
- DSA-5836-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2024:3432-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3980-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4163-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3424-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14377-1 xen-4.19.0_04-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3586-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3422-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4073-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3423-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3421-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-2209 XEN, Citrix XenServer und Hypervisor: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Dec 26, 2024