Description
PCI devices can make use of a functionality called phantom functions,
that when enabled allows the device to generate requests using the IDs
of functions that are otherwise unpopulated. This allows a device to
extend the number of outstanding requests.
Such phantom functions need an IOMMU context setup, but failure to
setup the context is not fatal when the device is assigned. Not
failing device assignment when such failure happens can lead to the
primary device being assigned to a guest, while some of the phantom
functions are assigned to a different domain.
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 | 4.17.3+10-g091466ba55-1 | — |
| Debian 13 | xen | 4.17.3+10-g091466ba55-1 | — |
| Debian 12 | xen | 4.17.3+10-g091466ba55-1~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 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 | 4.17.3_04-150500.3.21.1 | SUSE-SU-2024:0830-1, SUSE-SU-2024:0266-1 |
| SLES 15 SP4 | xen | 4.16.5_12-150400.4.46.1 | SUSE-SU-2024:0268-1 |
| SLES 15 SP3 | xen | 4.14.6_10-150300.3.63.1 | SUSE-SU-2024:0264-1 |
| SLES 15 SP2 | xen | 4.13.5_10-150200.3.86.1 | SUSE-SU-2024:0270-1 |
| SLES 15 SP1 | xen | 4.12.4_44-150100.3.101.1 | SUSE-SU-2024:0269-1 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | xen | 4.12.4_44-3.103.1 | SUSE-SU-2024:0265-1 |
| SLES for SAP 15 SP4 | xen | 4.16.5_12-150400.4.46.1 | SUSE-SU-2024:0268-1 |
| SLES for SAP 15 SP3 | xen | 4.14.6_10-150300.3.63.1 | SUSE-SU-2024:0264-1 |
| SLES for SAP 15 SP2 | xen | 4.13.5_10-150200.3.86.1 | SUSE-SU-2024:0270-1 |
| SLES for SAP 15 SP1 | xen | 4.12.4_44-150100.3.101.1 | SUSE-SU-2024:0269-1 |
| SLES for SAP 12 SP5 | xen | 4.12.4_44-3.103.1 | SUSE-SU-2024:0265-1 |
| SLE Micro 5.5 | xen | 4.17.3_04-150500.3.21.1 | SUSE-SU-2024:0830-1, SUSE-SU-2024:0266-1 |
| SLE Micro 5.4 | xen | 4.16.5_12-150400.4.46.1 | SUSE-SU-2024:0268-1 |
| SLE Micro 5.3 | xen | 4.16.5_12-150400.4.46.1 | SUSE-SU-2024:0268-1 |
| SLE Micro 5.2 | xen | 4.14.6_10-150300.3.63.1 | SUSE-SU-2024:0264-1 |
| SLE Micro 5.1 | xen | 4.14.6_10-150300.3.63.1 | SUSE-SU-2024:0264-1 |
| SLE HPC 15 SP4 | xen | 4.16.5_12-150400.4.46.1 | SUSE-SU-2024:0268-1 |
| SLE HPC 15 SP3 | xen | 4.14.6_10-150300.3.63.1 | SUSE-SU-2024:0264-1 |
| SLE HPC 15 SP2 | xen | 4.13.5_10-150200.3.86.1 | SUSE-SU-2024:0270-1 |
| SLE HPC 15 SP1 | xen | 4.12.4_44-150100.3.101.1 | SUSE-SU-2024:0269-1 |
| SUSE Manager Server 4.3 | xen | 4.16.5_12-150400.4.46.1 | SUSE-SU-2024:0268-1 |
| SUSE Manager Proxy 4.3 | xen | 4.16.5_12-150400.4.46.1 | SUSE-SU-2024:0268-1 |
| SUSE Enterprise Storage 7.1 | xen | 4.14.6_10-150300.3.63.1 | SUSE-SU-2024:0264-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.18.0_06-1.1 | openSUSE-SU-2024:13648-1 |
| openSUSE Leap 15.5 | xen | 4.17.3_04-150500.3.21.1 | SUSE-SU-2024:0830-1, SUSE-SU-2024:0266-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | xen | 4.16.5_12-150400.4.46.1 | SUSE-SU-2024:0268-1 |
| openSUSE Leap Micro 5.3 | xen | 4.16.5_12-150400.4.46.1 | SUSE-SU-2024:0268-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.18.0-r3 | — |
| Alpine v3.23 | xen | 4.18.0-r3 | — |
| Alpine v3.22 | xen | 4.18.0-r3 | — |
| Alpine v3.21 | xen | 4.18.0-r3 | — |
| Alpine v3.20 | xen | 4.18.0-r3 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.18.0-r3 | — |
| Alpine v3.18 | xen | 4.17.3-r0 | — |
| Alpine v3.17 | xen | 4.16.5-r6 | — |
| Alpine v3.16 | xen | 4.16.5-r6 | — |
Advisories 9
- SUSE-SU-2024:0270-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13648-1 xen-4.18.0_06-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0265-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0269-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0830-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0268-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0264-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0266-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2024-0261 Xen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 22, 2024