CVE-2023-46840

MEDIUMNVD 4.14.1—

4.1

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.

CVSS v3: 4.1
EG Score: 4.1(medium)
EPSS: 22.3%
KEV: Not listed

Published

March 20, 2024

Last Modified

January 13, 2026

References (4)

security@xenhttps://xenbits.xenproject.org/xsa/advisory-450.html
af854a3a-2127-422b-91ae-364da2661108http://xenbits.xen.org/xsa/advisory-450.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XLL6SQ6IKFYXLYWITYZCRV5IBRK5G35R/
af854a3a-2127-422b-91ae-364da2661108https://xenbits.xenproject.org/xsa/advisory-450.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-670

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 06:23 UTCEG score recompute
2026-05-24 06:23 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2023-46840?

CVE-2023-46840 is a medium vulnerability published on March 20, 2024. 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.

When was CVE-2023-46840 disclosed?

CVE-2023-46840 was first published in the National Vulnerability Database on March 20, 2024, with the most recent update on January 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-46840 actively exploited?

CVE-2023-46840 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-46840?

CVE-2023-46840 has a CVSS v3 base score of 4.1 (NVD).

How do I remediate CVE-2023-46840?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-46840, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-46840

📅 Published

🔄 Last Modified

🔗 References (4)