Description
A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check.
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 | 4.16.0+51-g0941d6cb-1 | — |
| Debian 13 | xen | 4.16.0+51-g0941d6cb-1 | — |
| Debian 12 | xen | 4.16.0+51-g0941d6cb-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 | 4.14.3_06-150300.3.18.2 | SUSE-SU-2022:0333-1 |
| SLES 15 SP2 | xen | 4.13.4_04-3.43.2 | SUSE-SU-2022:0467-1 |
| SLES 15 SP1 | xen | 4.12.4_18-3.60.2 | SUSE-SU-2022:0468-1 |
| SLES 12 SP5 | xen | 4.12.4_18-3.58.2 | SUSE-SU-2022:0469-1 |
| SLES 12 SP4 | xen | 4.11.4_26-2.68.1 | SUSE-SU-2022:0331-1 |
Show 25 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | xen | 4.9.4_26-3.100.1 | SUSE-SU-2022:0359-1 |
| SLES 12 SP2 | xen | 4.7.6_20-43.85.1 | SUSE-SU-2022:0342-1 |
| SLES 11 SP4 | xen | 4.4.4_52-61.70.1 | SUSE-SU-2022:14886-1 |
| SLES for SAP 15 SP2 | xen | 4.13.4_04-3.43.2 | SUSE-SU-2022:0467-1 |
| SLES for SAP 15 SP1 | xen | 4.12.4_18-3.60.2 | SUSE-SU-2022:0468-1 |
| SLES for SAP 15 | xen | 4.10.4_32-3.71.1 | SUSE-SU-2022:0332-1 |
| SLES for SAP 12 SP5 | xen | 4.12.4_18-3.58.2 | SUSE-SU-2022:0469-1 |
| SLES for SAP 12 SP4 | xen | 4.11.4_26-2.68.1 | SUSE-SU-2022:0331-1 |
| SLES for SAP 12 SP3 | xen | 4.9.4_26-3.100.1 | SUSE-SU-2022:0359-1 |
| SLE Real Time 15 SP2 | xen | 4.13.4_04-3.43.2 | SUSE-SU-2022:0467-1 |
| SLE Micro 5.1 | xen | 4.14.3_06-150300.3.18.2 | SUSE-SU-2022:0333-1 |
| SLE Micro 5.0 | xen | 4.13.4_04-3.43.2 | SUSE-SU-2022:0467-1 |
| SLE HPC 15 SP2 | xen | 4.13.4_04-3.43.2 | SUSE-SU-2022:0467-1 |
| SLE HPC 15 SP1 | xen | 4.12.4_18-3.60.2 | SUSE-SU-2022:0468-1 |
| SLE HPC 15 | xen | 4.10.4_32-3.71.1 | SUSE-SU-2022:0332-1 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_26-2.68.1 | SUSE-SU-2022:0331-1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_26-3.100.1 | SUSE-SU-2022:0359-1 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_26-2.68.1 | SUSE-SU-2022:0331-1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_26-3.100.1 | SUSE-SU-2022:0359-1 |
| SUSE Manager Server 4.1 | xen | 4.13.4_04-3.43.2 | SUSE-SU-2022:0467-1 |
| SUSE Manager Retail Branch Server 4.1 | xen | 4.13.4_04-3.43.2 | SUSE-SU-2022:0467-1 |
| SUSE Manager Proxy 4.1 | xen | 4.13.4_04-3.43.2 | SUSE-SU-2022:0467-1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_26-3.100.1 | SUSE-SU-2022:0359-1 |
| SUSE Enterprise Storage 7 | xen | 4.13.4_04-3.43.2 | SUSE-SU-2022:0467-1 |
| SUSE Enterprise Storage 6 | xen | 4.12.4_18-3.60.2 | SUSE-SU-2022:0468-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xen | 4.16.0_04-3.1 | openSUSE-SU-2024:11781-1 |
| openSUSE Leap 15.3 | xen | 4.14.3_06-150300.3.18.2 | openSUSE-SU-2022:0333-1 |
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-r0 | — |
| Alpine v3.14 | xen | 4.15.2-r0 | — |
| Alpine v3.13 | xen | 4.14.5-r0 | — |
| Alpine v3.12 | xen | 4.13.4-r3 | — |
Advisories 12
- DSA-5117-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:0332-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:14886-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0468-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0333-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0342-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0469-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0359-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0333-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0331-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11781-1 xen-4.16.0_04-3.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2022:0467-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
References
- https://xenbits.xenproject.org/xsa/advisory-394.txt
- [oss-security] 20220125 Xen Security Advisory 394 v3 (CVE-2022-23034) - A PV guest could DoS Xen while unmapping a grant mailing-list
- FEDORA-2022-0cc3916e08 vendor-advisory
- DSA-5117 vendor-advisory
- GLSA-202208-23 vendor-advisory