Description
VMFUNC emulation in Xen 4.6.x through 4.8.x on x86 systems using AMD virtualization extensions (aka SVM) allows local HVM guest OS users to cause a denial of service (hypervisor crash) by leveraging a missing NULL pointer 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 | 4.8.0-1 | — |
| Debian 13 | xen | 4.8.0-1 | — |
| Debian 12 | xen | 4.8.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | xen | 4.6.0-1ubuntu4.3 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | xen | 4.7.1_04-28.1 | SUSE-SU-2016:3208-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | xen | 4.7.1_04-28.1 | SUSE-SU-2016:3208-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.15.1_01-1.2 | openSUSE-SU-2024:11520-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.7.1-r4 | — |
| Alpine v3.23 | xen | 4.7.1-r4 | — |
| Alpine v3.22 | xen | 4.7.1-r4 | — |
| Alpine v3.21 | xen | 4.7.1-r4 | — |
| Alpine v3.20 | xen | 4.7.1-r4 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.7.1-r4 | — |
| Alpine v3.18 | xen | 4.7.1-r4 | — |
| Alpine v3.17 | xen | 4.7.1-r4 | — |
| Alpine v3.16 | xen | 4.7.1-r4 | — |
| Alpine v3.15 | xen | 4.7.1-r4 | — |
| Alpine v3.14 | xen | 4.7.1-r4 | — |
| Alpine v3.13 | xen | 4.7.1-r4 | — |
| Alpine v3.12 | xen | 4.7.1-r4 | — |
| Alpine v3.11 | xen | 4.7.1-r4 | — |
| Alpine v3.10 | xen | 4.7.1-r4 | — |
| Alpine v3.9 | xen | 4.7.1-r4 | — |
| Alpine v3.8 | xen | 4.7.1-r4 | — |
| Alpine v3.7 | xen | 4.7.1-r4 | — |
| Alpine v3.6 | xen | 4.7.1-r4 | — |
| Alpine v3.5 | xen | 4.7.1-r4 | — |
| Alpine v3.4 | xen | 4.6.3-r7 | — |
| Alpine v3.3 | xen | 4.6.3-r5 | — |
Advisories 2
- SUSE-SU-2016:3208-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11520-1 xen-4.15.1_01-1.2 on GA media SUSE / openSUSE Security Updates · May 7, 2025