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Fencer Vulns
high 7.8

CVE-2022-26360 json

IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which as…

published 2022-04-05 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-30919

cvss
7.8
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

IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.16.1-1

debian advisories DEBIAN-CVE-2022-26360

  • xen SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +3 more 4.12.4_24-150100.3.72.1
  • xen SLE Module for Server Applications 15 SP3, SLE Module for Basesystem 15 SP3, SLE Micro 5.2 +2 more 4.14.5_02-150300.3.29.1
  • xen SLE Module for Server Applications 15 SP3, SLE Module for Basesystem 15 SP3, SLE Micro 5.2 +2 more 4.14.4_04-150300.3.24.1
  • xen SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 4.12.4_22-3.66.1
  • xen SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +3 more 4.9.4_28-3.103.1
  • xen SLES 12 SP2-BCL 4.7.6_22-43.88.1
  • xen SLES for SAP 15, SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 4.10.4_34-150000.3.74.1
  • xen SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +8 more 4.13.4_08-150200.3.50.1

suse advisories SUSE-SU-2022:2158-1SUSE-SU-2022:2065-1SUSE-SU-2022:1506-1SUSE-SU-2022:1505-1SUSE-SU-2022:1408-1SUSE-SU-2022:1375-1

  • xen openSUSE Tumbleweed 4.16.0_08-1.1

opensuse advisories openSUSE-SU-2024:11979-1

  • xen Alpine 3.12 4.13.4-r3
  • xen Alpine 3.13 4.14.5-r0
  • xen Alpine 3.15, Alpine 3.14 4.15.2-r2
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 4.16.1-r0

alpine advisories ALPINE-CVE-2022-26360

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 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.4 AV:L/AC:M/Au:N/C:P/I:P/A:P

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.