Description
An issue was discovered in Xen through 4.11.x on Intel x86 platforms allowing guest OS users to cause a denial of service (host OS hang) because Xen does not work around Intel's mishandling of certain HLE transactions associated with the KACQUIRE instruction prefix.
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 | — |
| Debian 9 | xen | 4.8.5+shim4.10.2+xsa282-1+deb9u11 | DSA-4369-1 |
| Debian 8 | xen | 4.4.4lts4-0+deb8u1 | DLA-1577-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | xen | No fix yet | — |
| Ubuntu 16.04 LTS | xen | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | xen | 4.10.3_02-3.14.1 | SUSE-SU-2019:0875-1 |
| SLES 12 SP4 | xen | 4.11.1_02-2.3.1 | SUSE-SU-2019:0003-1 |
| SLES 12 SP2 | xen | 4.7.6_06-43.48.1 | SUSE-SU-2019:0921-1 |
| SLES 12 SP1 | xen | 4.5.5_28-22.58.1 | SUSE-SU-2019:0825-1 |
| SLES 12 | xen | 4.4.4_40-22.77.1 | SUSE-SU-2019:0827-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | xen | 4.4.4_38-61.40.1 | SUSE-SU-2019:13921-1 |
| SLES for SAP 12 SP4 | xen | 4.11.1_02-2.3.1 | SUSE-SU-2019:0003-1 |
| SLES for SAP 12 SP2 | xen | 4.7.6_06-43.48.1 | SUSE-SU-2019:0921-1 |
| SLES for SAP 12 SP1 | xen | 4.5.5_28-22.58.1 | SUSE-SU-2019:0825-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_38-61.40.1 | SUSE-SU-2019:13921-1 |
| SUSE OpenStack Cloud 7 | xen | 4.7.6_06-43.48.1 | SUSE-SU-2019:0921-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | 4.2.5_21-45.30.1 | SUSE-SU-2019:14011-1 |
| SUSE Enterprise Storage 4 | xen | 4.7.6_06-43.48.1 | SUSE-SU-2019:0921-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.15.1_01-1.2 | openSUSE-SU-2024:11520-1 |
| openSUSE Leap 15.0 | xen | 4.10.3_02-lp150.2.16.1 | openSUSE-SU-2019:1199-1 |
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 11
- DSA-4369-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1577-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:0003-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1199-1 Recommended update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14011-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0875-1 Recommended update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:13921-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0921-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0825-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0827-1 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-282.html
- https://support.citrix.com/article/CTX239432
- DSA-4369 vendor-advisory
- 106182 vdb-entry
- openSUSE-SU-2019:1199 vendor-advisory
- openSUSE-SU-2019:1226 vendor-advisory