Description
An issue was discovered in Xen through 4.12.x allowing Arm domU attackers to cause a denial of service (infinite loop) involving a compare-and-exchange operation.
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 | 4.11.3+24-g14b62ab3e5-1 | — |
| Debian 13 | xen | 4.11.3+24-g14b62ab3e5-1 | — |
| Debian 12 | xen | 4.11.3+24-g14b62ab3e5-1 | — |
| Debian 10 | xen | 4.11.3+24-g14b62ab3e5-1~deb10u1 | DSA-4602-1 |
| Debian 9 | xen | 4.8.5.final+shim4.10.4-1+deb9u12 | DSA-4602-1 |
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 SP1 | xen | 4.12.1_02-3.3.1 | SUSE-RU-2019:2715-1 |
Advisories 2
- DSA-4602-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-RU-2019:2715-1 Recommended update for xen SUSE / openSUSE Security Updates · May 2, 2025