Description
An issue was discovered in Xen 4.8.x through 4.10.x allowing x86 PVH guest OS users to cause a denial of service (NULL pointer dereference and hypervisor crash) by leveraging the mishandling of configurations that lack a Local APIC.
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 | 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 | — |
| Debian 13 | xen | 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 | — |
| Debian 12 | xen | 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 | — |
| Debian 9 | xen | 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 | DSA-4131-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | xen | 4.9.2_04-3.29.1 | SUSE-SU-2018:1184-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | xen | 4.9.2_04-3.29.1 | SUSE-SU-2018:1184-1 |
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 | 4.10.0-r2 | — |
| Alpine v3.23 | xen | 4.10.0-r2 | — |
| Alpine v3.22 | xen | 4.10.0-r2 | — |
| Alpine v3.21 | xen | 4.10.0-r2 | — |
| Alpine v3.20 | xen | 4.10.0-r2 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.10.0-r2 | — |
| Alpine v3.18 | xen | 4.10.0-r2 | — |
| Alpine v3.17 | xen | 4.10.0-r2 | — |
| Alpine v3.16 | xen | 4.10.0-r2 | — |
| Alpine v3.15 | xen | 4.10.0-r2 | — |
| Alpine v3.14 | xen | 4.10.0-r2 | — |
| Alpine v3.13 | xen | 4.10.0-r2 | — |
| Alpine v3.12 | xen | 4.10.0-r2 | — |
| Alpine v3.11 | xen | 4.10.0-r2 | — |
| Alpine v3.10 | xen | 4.10.0-r2 | — |
| Alpine v3.9 | xen | 4.10.0-r2 | — |
| Alpine v3.8 | xen | 4.10.0-r2 | — |
| Alpine v3.7 | xen | 4.9.1-r4 | — |
| Alpine v3.6 | xen | 4.8.2-r6 | — |
Advisories 3
- DSA-4131-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:1184-1 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-256.html
- GLSA-201810-06 vendor-advisory
- 1040776 vdb-entry
- DSA-4131 vendor-advisory