Description
Memory leak in Xen 3.3 through 4.8.x allows guest OS users to cause a denial of service (ARM or x86 AMD host OS memory consumption) by continually rebooting, because certain cleanup is skipped if no pass-through device was ever assigned, aka XSA-207.
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 | 4.8.1-1 | — |
| Debian 13 | xen | 4.8.1-1 | — |
| Debian 12 | xen | 4.8.1-1 | — |
| Debian 8 | xen | 4.4.4lts1-0+deb8u1 | DLA-1493-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | xen | 4.6.5-0ubuntu1 | — |
| Ubuntu 14.04 LTS | xen | 4.4.2-0ubuntu0.14.04.11 | — |
Advisories 1
- DLA-1493-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026