Description
Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Xen | xen | — | — |
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 | 4.16.1-1 | — |
| Debian 13 | xen | 4.16.1-1 | — |
| Debian 12 | xen | 4.16.1-1 | — |
| Debian 11 | xen | 4.14.4+74-gd7b22226b5-1 | DSA-5117-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | xen | No fix yet | — |
| Ubuntu 26.04 LTS | xen | No fix yet | — |
| Ubuntu 25.10 | xen | No fix yet | — |
| Ubuntu 24.04 LTS | xen | No fix yet | — |
| Ubuntu 22.04 LTS | xen | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| 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 SP3 | xen | 4.14.4_04-150300.3.24.1 | SUSE-SU-2022:1506-1 |
| SLES 15 SP2 | xen | 4.13.4_08-150200.3.50.1 | SUSE-SU-2022:1300-1 |
| SLES 15 SP1 | xen | 4.12.4_24-150100.3.72.1 | SUSE-SU-2022:2158-1 |
| SLES 12 SP5 | xen | 4.12.4_22-3.66.1 | SUSE-SU-2022:1505-1 |
| SLES 12 SP4 | xen | 4.11.4_28-2.73.1 | SUSE-SU-2022:1285-1 |
Show 25 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | xen | 4.9.4_28-3.103.1 | SUSE-SU-2022:1408-1 |
| SLES 12 SP2 | xen | 4.7.6_22-43.88.1 | SUSE-SU-2022:1375-1 |
| SLES for SAP 15 SP2 | xen | 4.13.4_08-150200.3.50.1 | SUSE-SU-2022:1300-1 |
| SLES for SAP 15 SP1 | xen | 4.12.4_24-150100.3.72.1 | SUSE-SU-2022:2158-1 |
| SLES for SAP 15 | xen | 4.10.4_34-150000.3.74.1 | SUSE-SU-2022:1359-1 |
| SLES for SAP 12 SP5 | xen | 4.12.4_22-3.66.1 | SUSE-SU-2022:1505-1 |
| SLES for SAP 12 SP4 | xen | 4.11.4_28-2.73.1 | SUSE-SU-2022:1285-1 |
| SLES for SAP 12 SP3 | xen | 4.9.4_28-3.103.1 | SUSE-SU-2022:1408-1 |
| SLE Real Time 15 SP2 | xen | 4.13.4_08-150200.3.50.1 | SUSE-SU-2022:1300-1 |
| SLE Micro 5.2 | xen | 4.14.4_04-150300.3.24.1 | SUSE-SU-2022:1506-1 |
| SLE Micro 5.1 | xen | 4.14.4_04-150300.3.24.1 | SUSE-SU-2022:1506-1 |
| SLE Micro 5.0 | xen | 4.13.4_08-150200.3.50.1 | SUSE-SU-2022:1300-1 |
| SLE HPC 15 SP2 | xen | 4.13.4_08-150200.3.50.1 | SUSE-SU-2022:1300-1 |
| SLE HPC 15 SP1 | xen | 4.12.4_24-150100.3.72.1 | SUSE-SU-2022:2158-1 |
| SLE HPC 15 | xen | 4.10.4_34-150000.3.74.1 | SUSE-SU-2022:1359-1 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_28-2.73.1 | SUSE-SU-2022:1285-1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_28-3.103.1 | SUSE-SU-2022:1408-1 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_28-2.73.1 | SUSE-SU-2022:1285-1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_28-3.103.1 | SUSE-SU-2022:1408-1 |
| SUSE Manager Server 4.1 | xen | 4.13.4_08-150200.3.50.1 | SUSE-SU-2022:1300-1 |
| SUSE Manager Retail Branch Server 4.1 | xen | 4.13.4_08-150200.3.50.1 | SUSE-SU-2022:1300-1 |
| SUSE Manager Proxy 4.1 | xen | 4.13.4_08-150200.3.50.1 | SUSE-SU-2022:1300-1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_28-3.103.1 | SUSE-SU-2022:1408-1 |
| SUSE Enterprise Storage 7 | xen | 4.13.4_08-150200.3.50.1 | SUSE-SU-2022:1300-1 |
| SUSE Enterprise Storage 6 | xen | 4.12.4_24-150100.3.72.1 | SUSE-SU-2022:2158-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.16.0_08-1.1 | openSUSE-SU-2024:11979-1 |
| openSUSE Leap 15.3 | xen | 4.14.4_04-150300.3.24.1 | SUSE-SU-2022:1506-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.16.1-r0 | — |
| Alpine v3.23 | xen | 4.16.1-r0 | — |
| Alpine v3.22 | xen | 4.16.1-r0 | — |
| Alpine v3.21 | xen | 4.16.1-r0 | — |
| Alpine v3.20 | xen | 4.16.1-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.16.1-r0 | — |
| Alpine v3.18 | xen | 4.16.1-r0 | — |
| Alpine v3.17 | xen | 4.16.1-r0 | — |
| Alpine v3.16 | xen | 4.16.1-r0 | — |
| Alpine v3.15 | xen | 4.15.2-r2 | — |
| Alpine v3.14 | xen | 4.15.2-r2 | — |
| Alpine v3.13 | xen | 4.14.5-r0 | — |
| Alpine v3.12 | xen | 4.13.4-r3 | — |
Advisories 11
- DSA-5117-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:1375-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2158-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1408-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1285-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1359-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1506-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11979-1 xen-4.16.0_08-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1505-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1300-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-0453 XEN / Citrix Hypervisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 4, 2024
References
- https://xenbits.xenproject.org/xsa/advisory-397.txt
- http://xenbits.xen.org/xsa/advisory-397.html
- [oss-security] 20220405 Xen Security Advisory 397 v2 (CVE-2022-26356) - Racy interactions between dirty vram tracking and paging log dirty hypercalls mailing-list
- DSA-5117 vendor-advisory
- FEDORA-2022-dfbf7e2372 vendor-advisory
- FEDORA-2022-64b2c02d29 vendor-advisory
- GLSA-202402-07 vendor-advisory