Description
Certain instructions need intercepting and emulating by Xen. In some
cases Xen emulates the instruction by replaying it, using an executable
stub. Some instructions may raise an exception, which is supposed to be
handled gracefully. Certain replayed instructions have additional logic
to set up and recover the changes to the arithmetic flags.
For replayed instructions where the flags recovery logic is used, the
metadata for exception handling was incorrect, preventing Xen from
handling the the exception gracefully, treating it as fatal instead.
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_02-150700.3.8.1 | SUSE-SU-2025:02315-1 |
| SLES 15 SP6 | xen | 4.18.5_04-150600.3.28.1 | SUSE-SU-2025:02316-1 |
| SLES 15 SP5 | xen | 4.17.5_10-150500.3.50.1 | SUSE-SU-2025:02325-1 |
| SLES 15 SP4 | xen | 4.16.7_02-150400.4.72.1 | SUSE-SU-2025:02326-1 |
| SLES 15 SP3 | xen | 4.14.6_26-150300.3.91.1 | SUSE-SU-2025:02319-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | xen | 4.12.4_62-3.130.1 | SUSE-SU-2025:02471-1 |
| SLES for SAP 15 SP5 | xen | 4.17.5_10-150500.3.50.1 | SUSE-SU-2025:02325-1 |
| SLES for SAP 15 SP4 | xen | 4.16.7_02-150400.4.72.1 | SUSE-SU-2025:02326-1 |
| SLES for SAP 15 SP3 | xen | 4.14.6_26-150300.3.91.1 | SUSE-SU-2025:02319-1 |
| SLE Micro 5.5 | xen | 4.17.5_10-150500.3.50.1 | SUSE-SU-2025:02325-1 |
| SLE Micro 5.4 | xen | 4.16.7_02-150400.4.72.1 | SUSE-SU-2025:02326-1 |
| SLE Micro 5.3 | xen | 4.16.7_02-150400.4.72.1 | SUSE-SU-2025:02326-1 |
| SLE Micro 5.2 | xen | 4.14.6_26-150300.3.91.1 | SUSE-SU-2025:02319-1 |
| SLE Micro 5.1 | xen | 4.14.6_26-150300.3.91.1 | SUSE-SU-2025:02319-1 |
| SLE HPC 15 SP5 | xen | 4.17.5_10-150500.3.50.1 | SUSE-SU-2025:02325-1 |
| SLE HPC 15 SP4 | xen | 4.16.7_02-150400.4.72.1 | SUSE-SU-2025:02326-1 |
| SLE HPC 15 SP3 | xen | 4.14.6_26-150300.3.91.1 | SUSE-SU-2025:02319-1 |
| SUSE Manager Server 4.3 | xen | 4.16.7_02-150400.4.72.1 | SUSE-SU-2025:02326-1 |
| SUSE Manager Proxy 4.3 | xen | 4.16.7_02-150400.4.72.1 | SUSE-SU-2025:02326-1 |
| SUSE Enterprise Storage 7.1 | xen | 4.14.6_26-150300.3.91.1 | SUSE-SU-2025:02319-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.20.1_02-1.1 | openSUSE-SU-2025:15342-1 |
| openSUSE Leap 15.6 | xen | 4.18.5_04-150600.3.28.1 | SUSE-SU-2025:02316-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.20.1-r0 | — |
| Alpine v3.23 | xen | 4.20.1-r0 | — |
| Alpine v3.22 | xen | 4.20.1-r0 | — |
| Alpine v3.21 | xen | 4.19.2-r2 | — |
| Alpine v3.20 | xen | 4.18.5-r1 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.18.5-r1 | — |
Advisories 9
- SUSE-SU-2025:02316-1 Security update for xen SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02319-1 Security update for xen SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02315-1 Security update for xen SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02326-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:02325-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:02471-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:15342-1 xen-4.20.1_02-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- DSA-6068-1 xen - security update Debian Security (DSA / DLA) · Dec 2, 2025
- WID-SEC-2025-1447 Xen: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Dec 2, 2025