What is CVE-2023-46840?

CVE-2023-46840 is a medium-severity vulnerability in Xen, classified under Always-Incorrect Control Flow Implementation. CVSS score: 4.1/10. Published 2024-03-20.

How severe is CVE-2023-46840?

Medium severity. CVSS v3 base score is 4.1 out of 10.

Is CVE-2023-46840 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Xen

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.

EPSS: 0.003 (18.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N.

Affected products

Xen — versions consult Xen advisory XSA-450
Fedoraproject Fedora — versions 39

Weakness classification (CWE)

CWE-670 — Always-Incorrect Control Flow Implementation

Public proof-of-concept exploits

NaInSec/CVE-LIST

References

security@xen.org (Patch, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2023-46840?: CVE-2023-46840 is a medium-severity vulnerability in Xen, classified under Always-Incorrect Control Flow Implementation. CVSS score: 4.1/10. Published 2024-03-20.
How severe is CVE-2023-46840?: Medium severity. CVSS v3 base score is 4.1 out of 10.
Is CVE-2023-46840 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.