Description
The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.
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 | 4.6.0-1 | — |
| Debian 13 | xen | 4.6.0-1 | — |
| Debian 12 | xen | 4.6.0-1 | — |
| Debian 8 | xen | 4.4.1-9+deb8u2 | DSA-3390-1 |
| Debian 7 | xen | 4.1.4-3+deb7u9 | DSA-3390-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | xen | 4.4.2-0ubuntu0.14.04.3 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | xen | 4.5.2_02-4.1 | SUSE-SU-2015:2324-1 |
| SLES 12 | xen | 4.4.3_02-22.12.1 | SUSE-SU-2015:2328-1, SUSE-SU-2015:1908-1 |
| SLES 11 SP4 | xen | 4.4.3_02-26.2 | SUSE-SU-2015:2338-1, SUSE-SU-2015:1894-1 |
| SLES 11 SP3 | xen | 4.2.5_14-18.2 | SUSE-SU-2015:1853-1 |
| SLES 11 SP2 | xen | 4.1.6_08-20.1 | SUSE-SU-2015:1952-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | xen | 4.5.2_02-4.1 | SUSE-SU-2015:2324-1 |
| SLES for SAP 12 | xen | 4.4.3_02-22.12.1 | SUSE-SU-2015:2328-1, SUSE-SU-2015:1908-1 |
| SLES for SAP 11 SP4 | xen | 4.4.3_02-26.2 | SUSE-SU-2015:2338-1, SUSE-SU-2015:1894-1 |
| SLES for SAP 11 SP3 | xen | 4.2.5_14-18.2 | SUSE-SU-2015:1853-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.7.0_12-1.3 | openSUSE-SU-2024:10196-1 |
Advisories 9
- DSA-3390-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:1952-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2328-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2324-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1894-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1853-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1908-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2338-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10196-1 xen-4.7.0_12-1.3 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- http://support.citrix.com/article/CTX202404
- 77366 vdb-entry
- FEDORA-2015-242be2c240 vendor-advisory
- FEDORA-2015-a931b02be2 vendor-advisory
- http://xenbits.xen.org/xsa/advisory-148.html
- openSUSE-SU-2015:2250 vendor-advisory
- https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-022-2015.txt
- DSA-3390 vendor-advisory
- 1034032 vdb-entry
- openSUSE-SU-2015:1965 vendor-advisory
- FEDORA-2015-6f6b79efe2 vendor-advisory
- GLSA-201604-03 vendor-advisory