Description
An issue was discovered in Xen through 4.9.x on the ARM platform allowing guest OS users to obtain sensitive information from DRAM after a reboot, because disjoint blocks, and physical addresses that do not start at zero, are 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 | — |
| Ubuntu 16.04 LTS | xen | 4.6.5-0ubuntu1.4 | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 2
- 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