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Fencer Vulns
high 7.5

CVE-2024-31145 json

error handling in x86 IOMMU identity mapping

published 2024-09-25 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-29055

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

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. In the logic establishing these mappings, error handling was flawed, resulting in such mappings to potentially remain in place when they should have been removed again. Respective guests would then gain access to memory regions which they aren't supposed to have access to.

Patch / fix

  • xen Debian 12 4.17.5+23-ga4e5191dc0-1
  • xen Debian 14, Debian 13 4.19.1-1

debian advisories DEBIAN-CVE-2024-31145

  • xen SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 4.12.4_56-3.121.1
  • xen SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +5 more 4.16.6_04-150400.4.62.1
  • xen SLE Module for Server Applications 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 4.18.3_02-150600.3.6.1
  • xen SLE Module for Server Applications 15 SP5, SLE Module for Basesystem 15 SP5, SLE Micro 5.5 +2 more 4.17.5_02-150500.3.36.1
  • xen SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 4.12.4_52-3.115.1
  • xen SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +3 more 4.14.6_18-150300.3.78.1
  • xen SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE High Performance Computing 15 SP2-LTSS 4.13.5_14-150200.3.96.1

suse advisories SUSE-SU-2024:3586-1SUSE-SU-2024:3423-1SUSE-SU-2024:3113-1SUSE-SU-2024:3075-1SUSE-SU-2024:3010-1SUSE-SU-2024:3001-1

  • xen openSUSE Tumbleweed 4.19.0_02-1.1

opensuse advisories openSUSE-SU-2024:14283-1

  • xen Alpine 3.17 4.16.6-r1
  • xen Alpine 3.18 4.17.5-r0
  • xen Alpine 3.20, Alpine 3.19 4.18.3-r0
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 4.19.0-r0

alpine advisories ALPINE-CVE-2024-31145

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

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-31145 updated cvss 7.5

xen: error handling in x86 IOMMU identity mapping

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

  • Xen Xen

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

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.