CVE-2023-46840

VT-d: Failure to quarantine devices in !HVM builds

MEDIUM
4.1
CVSS Score
Published: March 20, 2024 at 10:40 AM UTC
Updated: June 17, 2026 at 06:31 AM UTC
2 products affected across 2 vendorsFedoraXen

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Severity
MEDIUM4.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Incorrect placement of a preprocessor directive in source code results in logic that doesn't operate as intended when support for HVM guests is compiled out of Xen.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Xen· Xenwordpress-plugin
95%
v ≥ 4.17
Vendor states this is fixed in consult Xen advisory XSA-450 (unknown)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

PatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://xenbits.xen.org/xsa/advisory-450.html
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/[email protected]/message/XLL6SQ6IKFYXLYWITYZCRV5IBRK5G35R/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.1MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
HIGH
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-670

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