Description
Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.
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 | 4.8.0~rc3-1 | — |
| Debian 13 | xen | 4.8.0~rc3-1 | — |
| Debian 12 | xen | 4.8.0~rc3-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | xen | 4.6.0-1ubuntu4.2 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | xen | 4.5.3_08-17.1 | SUSE-SU-2016:2473-1, SUSE-SU-2016:2093-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | xen | 4.5.3_08-17.1 | SUSE-SU-2016:2473-1, SUSE-SU-2016:2093-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.7.0_12-1.3 | openSUSE-SU-2024:10196-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.7.0-r0 | — |
| Alpine v3.23 | xen | 4.7.0-r0 | — |
| Alpine v3.22 | xen | 4.7.0-r0 | — |
| Alpine v3.21 | xen | 4.7.0-r0 | — |
| Alpine v3.20 | xen | 4.7.0-r0 | — |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.7.0-r0 | — |
| Alpine v3.18 | xen | 4.7.0-r0 | — |
| Alpine v3.17 | xen | 4.7.0-r0 | — |
| Alpine v3.16 | xen | 4.7.0-r0 | — |
| Alpine v3.15 | xen | 4.7.0-r0 | — |
| Alpine v3.14 | xen | 4.7.0-r0 | — |
| Alpine v3.13 | xen | 4.7.0-r0 | — |
| Alpine v3.12 | xen | 4.7.0-r0 | — |
| Alpine v3.11 | xen | 4.7.0-r0 | — |
| Alpine v3.10 | xen | 4.7.0-r0 | — |
| Alpine v3.9 | xen | 4.7.0-r0 | — |
| Alpine v3.8 | xen | 4.7.0-r0 | — |
| Alpine v3.7 | xen | 4.7.0-r0 | — |
| Alpine v3.6 | xen | 4.7.0-r0 | — |
| Alpine v3.5 | xen | 4.7.0-r0 | — |
| Alpine v3.4 | xen | 4.6.3-r1 | — |
Advisories 3
- SUSE-SU-2016:2473-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2093-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10196-1 xen-4.7.0_12-1.3 on GA media SUSE / openSUSE Security Updates · May 7, 2025