Skip to content
Fencer Vulns
medium 6.7

CVE-2022-26363 json

x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects…

published 2022-06-09 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-30922

cvss
6.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

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.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.16.2-1

debian advisories DEBIAN-CVE-2022-26363

  • xen SLES for SAP 15, SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 4.10.4_36-150000.3.77.1
  • xen SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +3 more 4.12.4_26-150100.3.75.1
  • xen SLE Module for Server Applications 15 SP3, SLE Module for Basesystem 15 SP3, SLE Micro 5.2 +3 more 4.14.5_04-150300.3.32.1
  • xen SLE Module for Server Applications 15 SP4, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 4.16.1_06-150400.4.8.1
  • xen SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +6 more 4.13.4_12-150200.3.58.1
  • xen SLES 12 SP3-BCL 4.9.4_30-3.106.1
  • xen SLES 12 SP2-BCL 4.7.6_24-43.91.1
  • xen SLES for SAP 12 SP4, SLES 12 SP4-LTSS, OpenStack Cloud Crowbar 9 +1 more 4.11.4_30-2.76.1

suse advisories SUSE-SU-2022:2601-1SUSE-SU-2022:2600-1SUSE-SU-2022:2599-2SUSE-SU-2022:2599-1SUSE-SU-2022:2597-1SUSE-SU-2022:2591-1

  • xen openSUSE Tumbleweed 4.16.1_02-3.1

opensuse advisories openSUSE-SU-2024:12219-1

  • xen Alpine 3.13 4.14.5-r1
  • xen Alpine 3.15, Alpine 3.14 4.15.2-r1
  • xen Alpine 3.16 4.16.1-r1
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 4.16.1-r2

alpine advisories ALPINE-CVE-2022-26363

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • Xen xen

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.