Description
An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.
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 | 4.14.0+80-gd101b417b7-1 | — |
| Debian 13 | xen | 4.14.0+80-gd101b417b7-1 | — |
| Debian 12 | xen | 4.14.0+80-gd101b417b7-1 | — |
| Debian 10 | xen | 4.11.4+57-g41a822c392-1 | DSA-4804-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | xen | No fix yet | — |
| Ubuntu 18.04 LTS | xen | No fix yet | — |
| Ubuntu 16.04 LTS | xen | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | xen | 4.13.2_04-3.19.1 | SUSE-SU-2020:3615-1 |
| SLES 15 SP1 | xen | 4.12.4_04-3.37.1 | SUSE-SU-2020:3611-1 |
| SLES 12 SP4 | xen | 4.11.4_14-2.45.1 | SUSE-SU-2020:3653-1 |
| SLES 12 SP3 | xen | 4.9.4_14-3.77.1 | SUSE-SU-2020:3631-1 |
| SLES 12 SP2 | xen | 4.7.6_12-43.70.1 | SUSE-SU-2020:3742-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | xen | 4.4.4_46-61.58.1 | SUSE-SU-2020:14557-1 |
| SLES for SAP 15 | xen | 4.10.4_22-3.50.1 | SUSE-SU-2020:3627-1 |
| SLES for SAP 12 SP4 | xen | 4.11.4_14-2.45.1 | SUSE-SU-2020:3653-1 |
| SLES for SAP 12 SP3 | xen | 4.9.4_14-3.77.1 | SUSE-SU-2020:3631-1 |
| SLES for SAP 12 SP2 | xen | 4.7.6_12-43.70.1 | SUSE-SU-2020:3742-1 |
| SLE HPC 15 | xen | 4.10.4_22-3.50.1 | SUSE-SU-2020:3627-1 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_14-2.45.1 | SUSE-SU-2020:3653-1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_14-3.77.1 | SUSE-SU-2020:3631-1 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_14-2.45.1 | SUSE-SU-2020:3653-1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_14-3.77.1 | SUSE-SU-2020:3631-1 |
| SUSE OpenStack Cloud 7 | xen | 4.7.6_12-43.70.1 | SUSE-SU-2020:3742-1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_14-3.77.1 | SUSE-SU-2020:3631-1 |
| SUSE Enterprise Storage 5 | xen | 4.9.4_14-3.77.1 | SUSE-SU-2020:3631-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.15.1_01-1.2 | openSUSE-SU-2024:11520-1 |
| openSUSE Leap 15.2 | xen | 4.13.2_04-lp152.2.18.1 | openSUSE-SU-2020:2162-1 |
| openSUSE Leap 15.1 | xen | 4.12.4_04-lp151.2.33.1 | openSUSE-SU-2020:2192-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.14.0-r2 | — |
| Alpine v3.23 | xen | 4.14.0-r2 | — |
| Alpine v3.22 | xen | 4.14.0-r2 | — |
| Alpine v3.21 | xen | 4.14.0-r2 | — |
| Alpine v3.20 | xen | 4.14.0-r2 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.14.0-r2 | — |
| Alpine v3.18 | xen | 4.14.0-r2 | — |
| Alpine v3.17 | xen | 4.14.0-r2 | — |
| Alpine v3.16 | xen | 4.14.0-r2 | — |
| Alpine v3.15 | xen | 4.14.0-r2 | — |
| Alpine v3.14 | xen | 4.14.0-r2 | — |
| Alpine v3.13 | xen | 4.14.0-r2 | — |
| Alpine v3.12 | xen | 4.13.2-r0 | — |
| Alpine v3.11 | xen | 4.13.2-r0 | — |
| Alpine v3.10 | xen | 4.12.4-r0 | — |
Advisories 11
- DSA-4804-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:3653-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3627-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2192-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3615-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3742-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3611-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:14557-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2162-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3631-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11520-1 xen-4.15.1_01-1.2 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- https://xenbits.xen.org/xsa/advisory-286.html
- GLSA-202011-06 vendor-advisory
- FEDORA-2020-5398bfb466 vendor-advisory
- FEDORA-2020-ec84c1565b vendor-advisory
- FEDORA-2020-6dd36a716c vendor-advisory
- DSA-4804 vendor-advisory
- [oss-security] 20210119 Xen Security Advisory 286 v6 (CVE-2020-27674) - x86 PV guest INVLPG-like flushes may leave stale TLB entries mailing-list