Description
The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.
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 | 4.8.0~rc3-1 | — |
| Debian 13 | xen | 4.8.0~rc3-1 | — |
| Debian 12 | xen | 4.8.0~rc3-1 | — |
| Debian 8 | xen | 4.4.1-9+deb8u6 | DSA-3633-1 |
| Debian 7 | xen | 4.1.6.lts1-1 | DLA-571-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | xen | 4.6.0-1ubuntu4.2 | — |
| Ubuntu 14.04 LTS | xen | 4.4.2-0ubuntu0.14.04.7 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | xen | 4.5.3_08-17.1 | SUSE-SU-2016:2473-1, SUSE-SU-2016:2093-1 |
| SLES 12 | xen | 4.4.4_04-22.22.2 | SUSE-SU-2016:2533-1 |
| SLES 11 SP4 | xen | 4.4.4_07-37.1 | SUSE-SU-2016:2507-1, SUSE-SU-2016:2100-1 |
| SLES 11 SP3 | xen | 4.2.5_21-27.1 | SUSE-SU-2016:2725-1 |
| SLES 11 SP2 | xen | 4.1.6_08-29.1 | SUSE-SU-2016:2528-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | xen | 4.5.3_08-17.1 | SUSE-SU-2016:2473-1, SUSE-SU-2016:2093-1 |
| SLES for SAP 12 | xen | 4.4.4_04-22.22.2 | SUSE-SU-2016:2533-1 |
| SLES for SAP 11 SP4 | xen | 4.4.4_07-37.1 | SUSE-SU-2016:2507-1, SUSE-SU-2016:2100-1 |
| SUSE OpenStack Cloud 5 | xen | 4.2.5_21-27.1 | SUSE-SU-2016:2725-1 |
| SUSE Manager Proxy 2.1 | xen | 4.2.5_21-27.1 | SUSE-SU-2016:2725-1 |
| SUSE Manager 2.1 | xen | 4.2.5_21-27.1 | SUSE-SU-2016:2725-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | 4.2.5_21-27.1 | SUSE-SU-2016:2725-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.7.0_12-1.3 | openSUSE-SU-2024:10196-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.7.0-r0 | — |
| Alpine v3.23 | xen | 4.7.0-r0 | — |
| Alpine v3.22 | xen | 4.7.0-r0 | — |
| Alpine v3.21 | xen | 4.7.0-r0 | — |
| Alpine v3.20 | xen | 4.7.0-r0 | — |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.7.0-r0 | — |
| Alpine v3.18 | xen | 4.7.0-r0 | — |
| Alpine v3.17 | xen | 4.7.0-r0 | — |
| Alpine v3.16 | xen | 4.7.0-r0 | — |
| Alpine v3.15 | xen | 4.7.0-r0 | — |
| Alpine v3.14 | xen | 4.7.0-r0 | — |
| Alpine v3.13 | xen | 4.7.0-r0 | — |
| Alpine v3.12 | xen | 4.7.0-r0 | — |
| Alpine v3.11 | xen | 4.7.0-r0 | — |
| Alpine v3.10 | xen | 4.7.0-r0 | — |
| Alpine v3.9 | xen | 4.7.0-r0 | — |
| Alpine v3.8 | xen | 4.7.0-r0 | — |
| Alpine v3.7 | xen | 4.7.0-r0 | — |
| Alpine v3.6 | xen | 4.7.0-r0 | — |
| Alpine v3.5 | xen | 4.7.0-r0 | — |
| Alpine v3.4 | xen | 4.6.3-r1 | — |
Advisories 10
- DLA-571-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3633-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2528-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2507-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2473-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2533-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2725-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2100-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2093-1 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://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://xenbits.xen.org/xsa/advisory-182.html
- http://xenbits.xen.org/xsa/xsa182-4.6.patch
- http://support.citrix.com/article/CTX214954
- GLSA-201611-09 vendor-advisory
- http://xenbits.xen.org/xsa/xsa182-unstable.patch
- http://xenbits.xen.org/xsa/xsa182-4.5.patch
- DSA-3633 vendor-advisory
- 1036446 vdb-entry
- 92131 vdb-entry