Description
An issue was discovered in Xen through 4.9.x allowing HVM guest OS users to gain privileges on the host OS, obtain sensitive information, or cause a denial of service (BUG and host OS crash) by leveraging the mishandling of Populate on Demand (PoD) Physical-to-Machine (P2M) errors.
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 | 4.4.4lts3-0+deb8u1 | DLA-1559-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | xen | 4.1.6.lts1-11 | DLA-1230-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | xen | 4.9.2-0ubuntu1 | — |
| Ubuntu 16.04 LTS | xen | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.6 | xen | 4.8.2-r2 | — |
| Alpine v3.5 | xen | 4.7.3-r2 | — |
Advisories 3
- DSA-4050-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1559-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1230-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- 102013 vdb-entry
- [debian-lts-announce] 20181030 [SECURITY] [DLA 1559-1] xen security update mailing-list
- 1039879 vdb-entry
- 102129 vdb-entry
- [debian-lts-announce] 20180105 [SECURITY] [DLA 1230-1] xen security update mailing-list
- https://xenbits.xen.org/xsa/advisory-247.html
- GLSA-201801-14 vendor-advisory
- https://support.citrix.com/article/CTX230138