Description
An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted.
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 | 4.11.1-1 | — |
| Debian 13 | xen | 4.11.1-1 | — |
| Debian 12 | xen | 4.11.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | xen | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | xen | 4.10.2_04-3.9.1 | SUSE-SU-2018:4300-1 |
| SLES 12 SP4 | xen | 4.11.1_02-2.3.1 | SUSE-SU-2019:0003-1 |
| SLES 12 SP3 | xen | 4.9.3_03-3.47.1 | SUSE-SU-2018:4070-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | xen | 4.11.1_02-2.3.1 | SUSE-SU-2019:0003-1 |
| SLES for SAP 12 SP3 | xen | 4.9.3_03-3.47.1 | SUSE-SU-2018:4070-1 |
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 | 4.11.1-r0 | — |
| Alpine v3.23 | xen | 4.11.1-r0 | — |
| Alpine v3.22 | xen | 4.11.1-r0 | — |
| Alpine v3.21 | xen | 4.11.1-r0 | — |
| Alpine v3.20 | xen | 4.11.1-r0 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.11.1-r0 | — |
| Alpine v3.18 | xen | 4.11.1-r0 | — |
| Alpine v3.17 | xen | 4.11.1-r0 | — |
| Alpine v3.16 | xen | 4.11.1-r0 | — |
| Alpine v3.15 | xen | 4.11.1-r0 | — |
| Alpine v3.14 | xen | 4.11.1-r0 | — |
| Alpine v3.13 | xen | 4.11.1-r0 | — |
| Alpine v3.12 | xen | 4.11.1-r0 | — |
| Alpine v3.11 | xen | 4.11.1-r0 | — |
| Alpine v3.10 | xen | 4.11.1-r0 | — |
| Alpine v3.9 | xen | 4.11.1-r0 | — |
| Alpine v3.8 | xen | 4.10.2-r1 | — |
| Alpine v3.7 | xen | 4.9.3-r1 | — |
| Alpine v3.6 | xen | 4.8.5-r0 | — |
Advisories 4
- SUSE-SU-2019:0003-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4070-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4300-1 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
References
- https://xenbits.xen.org/xsa/advisory-278.html
- 1042021 vdb-entry
- 105817 vdb-entry