Description
The XEN_DOMCTL_memory_mapping hypercall in Xen 3.2.x through 4.5.x, when using a PCI passthrough device, is not preemptible, which allows local x86 HVM domain users to cause a denial of service (host CPU consumption) via a crafted request to the device model (qemu-dm).
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 | 4.4.1-9 | — |
| Debian 13 | xen | 4.4.1-9 | — |
| Debian 12 | xen | 4.4.1-9 | — |
| Debian 7 | xen | 4.1.6.1-1+deb7u1 | DLA-479-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | xen | 4.4.1-0ubuntu0.14.04.5 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | xen | 4.4.2_02-15.1 | SUSE-SU-2015:0923-1, SUSE-SU-2015:0701-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | xen | 4.4.2_02-15.1 | SUSE-SU-2015:0923-1, SUSE-SU-2015:0701-1 |
Advisories 3
- DLA-479-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:0701-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0923-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 1031994 vdb-entry
- GLSA-201504-04 vendor-advisory
- FEDORA-2015-5295 vendor-advisory
- SUSE-SU-2015:0923 vendor-advisory
- 73448 vdb-entry
- FEDORA-2015-5208 vendor-advisory
- http://xenbits.xen.org/xsa/advisory-125.html
- openSUSE-SU-2015:0732 vendor-advisory
- FEDORA-2015-5402 vendor-advisory