Description
An issue was discovered in Xen through 4.9.x allowing x86 guest OS users to cause a denial of service (hypervisor crash) or possibly gain privileges because MSI mapping was mishandled.
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 | 4.8.2+xsa245-0+deb9u1 | — |
| Debian 13 | xen | 4.8.2+xsa245-0+deb9u1 | — |
| Debian 12 | xen | 4.8.2+xsa245-0+deb9u1 | — |
| Debian 9 | xen | 4.8.2+xsa245-0+deb9u1 | DSA-4050-1 |
| Debian 8 | xen | 4.4.4lts2-0+deb8u1 | DLA-1549-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | xen | 4.9.2-0ubuntu1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | xen | 4.7.3_06-43.15.1 | SUSE-SU-2017:2864-1 |
| SLES 12 SP1 | xen | 4.5.5_18-22.31.1 | SUSE-SU-2017:2873-1 |
| SLES 12 | xen | 4.4.4_24-22.54.1 | SUSE-SU-2017:2856-1 |
| SLES 11 SP4 | xen | 4.4.4_24-61.12.1 | SUSE-SU-2017:2815-1 |
| SLES 11 SP3 | xen | 4.2.5_21-45.11.1 | SUSE-SU-2017:2812-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | xen | 4.7.3_06-43.15.1 | SUSE-SU-2017:2864-1 |
| SLES for SAP 12 SP1 | xen | 4.5.5_18-22.31.1 | SUSE-SU-2017:2873-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_24-61.12.1 | SUSE-SU-2017:2815-1 |
| SUSE OpenStack Cloud 6 | xen | 4.5.5_18-22.31.1 | SUSE-SU-2017:2873-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | 4.2.5_21-45.11.1 | SUSE-SU-2017:2812-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.9.0-r6 | — |
| Alpine v3.23 | xen | 4.9.0-r6 | — |
| Alpine v3.22 | xen | 4.9.0-r6 | — |
| Alpine v3.21 | xen | 4.9.0-r6 | — |
| Alpine v3.20 | xen | 4.9.0-r6 | — |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.9.0-r6 | — |
| Alpine v3.18 | xen | 4.9.0-r6 | — |
| Alpine v3.17 | xen | 4.9.0-r6 | — |
| Alpine v3.16 | xen | 4.9.0-r6 | — |
| Alpine v3.15 | xen | 4.9.0-r6 | — |
| Alpine v3.14 | xen | 4.9.0-r6 | — |
| Alpine v3.13 | xen | 4.9.0-r6 | — |
| Alpine v3.12 | xen | 4.9.0-r6 | — |
| Alpine v3.11 | xen | 4.9.0-r6 | — |
| Alpine v3.10 | xen | 4.9.0-r6 | — |
| Alpine v3.9 | xen | 4.9.0-r6 | — |
| Alpine v3.8 | xen | 4.9.0-r6 | — |
| Alpine v3.7 | xen | 4.9.0-r6 | — |
| Alpine v3.6 | xen | 4.8.2-r3 | — |
| Alpine v3.5 | xen | 4.7.3-r3 | — |
| Alpine v3.4 | xen | 4.6.6-r2 | — |
Advisories 7
- DLA-1549-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4050-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:2873-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2815-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2812-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2856-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2864-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://xenbits.xen.org/xsa/advisory-237.html
- DSA-4050 vendor-advisory
- https://support.citrix.com/article/CTX228867
- [debian-lts-announce] 20181018 [SECURITY] [DLA 1549-1] xen security update mailing-list
- 101500 vdb-entry
- GLSA-201801-14 vendor-advisory
- 1039568 vdb-entry