How severe is CVE-2023-46840?

CVE-2023-46840 has a CVSS 3.x base score of 4.1, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2023-46840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-46840?

CVE-2023-46840 primarily affects Xen. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-46840?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-46840 have an EU (EUVD) identifier?

Yes. CVE-2023-46840 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-51006.

When was CVE-2023-46840 published?

CVE-2023-46840 was published on 2024-03-20 and last updated on 2026-06-17.

CVE-2023-46840

CVE-2023-46840 is a medium-severity vulnerability in Xen with a CVSS 3.x base score of 4.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-670.

Key facts

Severity: Medium (CVSS 3.x base score 4.1)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-51006
Weakness: CWE-670
Affected product: Xen
Published: 2024-03-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-46840?: 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.
How severe is CVE-2023-46840?: CVE-2023-46840 has a CVSS 3.x base score of 4.1, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2023-46840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-46840?: CVE-2023-46840 primarily affects Xen. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-46840?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-46840 have an EU (EUVD) identifier?: Yes. CVE-2023-46840 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-51006.
When was CVE-2023-46840 published?: CVE-2023-46840 was published on 2024-03-20 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*

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