Description
x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.
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 | 4.17.1+2-gb773c48e36-1 | — |
| Debian 13 | xen | 4.17.1+2-gb773c48e36-1 | — |
| Debian 12 | xen | 4.17.1+2-gb773c48e36-1 | — |
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 SP5 | xen | 4.17.1_04-150500.3.3.1 | SUSE-SU-2023:2535-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.17.1_02-1.1 | openSUSE-SU-2024:12917-1 |
| openSUSE Leap 15.5 | xen | 4.17.1_04-150500.3.3.1 | SUSE-SU-2023:2535-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.17.0-r5 | — |
| Alpine v3.23 | xen | 4.17.0-r5 | — |
| Alpine v3.22 | xen | 4.17.0-r5 | — |
| Alpine v3.21 | xen | 4.17.0-r5 | — |
| Alpine v3.20 | xen | 4.17.0-r5 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.17.0-r5 | — |
| Alpine v3.18 | xen | 4.17.0-r5 | — |
Advisories 3
- openSUSE-SU-2024:12917-1 xen-4.17.1_02-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2535-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-1076 Xen: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Feb 4, 2024