Description
x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.
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 | 4.16.2-1 | — |
| Debian 13 | xen | 4.16.2-1 | — |
| Debian 12 | xen | 4.16.2-1 | — |
| Debian 11 | xen | 4.14.5+24-g87d90d511c-1 | DSA-5184-1 |
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 SP4 | xen | 4.16.1_04-150400.4.5.2 | SUSE-SU-2022:2597-1, SUSE-SU-2022:2296-1 |
| SLES 15 SP3 | xen | 4.14.5_02-150300.3.29.1 | SUSE-SU-2022:2599-1, SUSE-SU-2022:2065-1 |
| SLES 15 SP2 | xen | 4.13.4_10-150200.3.55.1 | SUSE-SU-2022:2591-1, SUSE-SU-2022:2164-1 |
| SLES 15 SP1 | xen | 4.12.4_24-150100.3.72.1 | SUSE-SU-2022:2600-1, SUSE-SU-2022:2158-1 |
| SLES 12 SP5 | xen | 4.12.4_24-3.71.1 | SUSE-SU-2022:2084-1 |
Show 20 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | xen | 4.11.4_30-2.76.1 | SUSE-SU-2022:2560-1 |
| SLES 12 SP3 | xen | 4.9.4_30-3.106.1 | SUSE-SU-2022:2574-1 |
| SLES 12 SP2 | xen | 4.7.6_24-43.91.1 | SUSE-SU-2022:2569-1 |
| SLES for SAP 15 SP2 | xen | 4.13.4_10-150200.3.55.1 | SUSE-SU-2022:2591-1, SUSE-SU-2022:2164-1 |
| SLES for SAP 15 SP1 | xen | 4.12.4_24-150100.3.72.1 | SUSE-SU-2022:2600-1, SUSE-SU-2022:2158-1 |
| SLES for SAP 15 | xen | 4.10.4_36-150000.3.77.1 | SUSE-SU-2022:2601-1 |
| SLES for SAP 12 SP5 | xen | 4.12.4_24-3.71.1 | SUSE-SU-2022:2084-1 |
| SLES for SAP 12 SP4 | xen | 4.11.4_30-2.76.1 | SUSE-SU-2022:2560-1 |
| SLE Micro 5.2 | xen | 4.14.5_02-150300.3.29.1 | SUSE-SU-2022:2599-1, SUSE-SU-2022:2065-1 |
| SLE Micro 5.1 | xen | 4.14.5_02-150300.3.29.1 | SUSE-SU-2022:2599-1, SUSE-SU-2022:2065-1 |
| SLE HPC 15 SP2 | xen | 4.13.4_10-150200.3.55.1 | SUSE-SU-2022:2591-1, SUSE-SU-2022:2164-1 |
| SLE HPC 15 SP1 | xen | 4.12.4_24-150100.3.72.1 | SUSE-SU-2022:2600-1, SUSE-SU-2022:2158-1 |
| SLE HPC 15 | xen | 4.10.4_36-150000.3.77.1 | SUSE-SU-2022:2601-1 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_30-2.76.1 | SUSE-SU-2022:2560-1 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_30-2.76.1 | SUSE-SU-2022:2560-1 |
| SUSE Manager Server 4.1 | xen | 4.13.4_10-150200.3.55.1 | SUSE-SU-2022:2591-1, SUSE-SU-2022:2164-1 |
| SUSE Manager Retail Branch Server 4.1 | xen | 4.13.4_10-150200.3.55.1 | SUSE-SU-2022:2591-1, SUSE-SU-2022:2164-1 |
| SUSE Manager Proxy 4.1 | xen | 4.13.4_10-150200.3.55.1 | SUSE-SU-2022:2591-1, SUSE-SU-2022:2164-1 |
| SUSE Enterprise Storage 7 | xen | 4.13.4_10-150200.3.55.1 | SUSE-SU-2022:2591-1, SUSE-SU-2022:2164-1 |
| SUSE Enterprise Storage 6 | xen | 4.12.4_24-150100.3.72.1 | SUSE-SU-2022:2600-1, SUSE-SU-2022:2158-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | xen | 4.16.1_04-150400.4.5.2 | SUSE-SU-2022:2597-1, SUSE-SU-2022:2296-1 |
| openSUSE Leap 15.3 | xen | 4.14.5_02-150300.3.29.1 | SUSE-SU-2022:2599-1, SUSE-SU-2022:2065-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.2 | xen | 4.14.5_04-150300.3.32.1 | SUSE-SU-2022:2599-2 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xen | 4.16.1-r2 | — |
| Alpine v3.23 | xen | 4.16.1-r2 | — |
| Alpine v3.22 | xen | 4.16.1-r2 | — |
| Alpine v3.21 | xen | 4.16.1-r2 | — |
| Alpine v3.20 | xen | 4.16.1-r2 | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xen | 4.16.1-r2 | — |
| Alpine v3.18 | xen | 4.16.1-r2 | — |
| Alpine v3.17 | xen | 4.16.1-r2 | — |
| Alpine v3.16 | xen | 4.16.1-r1 | — |
| Alpine v3.15 | xen | 4.15.2-r1 | — |
| Alpine v3.14 | xen | 4.15.2-r1 | — |
| Alpine v3.13 | xen | 4.14.5-r1 | — |
Advisories 15
- DSA-5184-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:2599-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2296-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2560-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2600-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2065-1 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-2022:2591-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2574-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2569-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2164-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2599-2 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2597-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2601-1 Security update for xen SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2084-1 Security update for xen SUSE / openSUSE Security Updates · May 2, 2025
References
- https://xenbits.xenproject.org/xsa/advisory-402.txt
- http://xenbits.xen.org/xsa/advisory-402.html
- [oss-security] 20220609 Xen Security Advisory 402 v4 (CVE-2022-26363,CVE-2022-26364) - x86 pv: Insufficient care with non-coherent mappings mailing-list
- FEDORA-2022-0142d562ca vendor-advisory
- http://packetstormsecurity.com/files/167710/Xen-PV-Guest-Non-SELFSNOOP-CPU-Memory-Corruption.html
- DSA-5184 vendor-advisory
- FEDORA-2022-2c9f8224f8 vendor-advisory
- GLSA-202208-23 vendor-advisory