What is CVE-2023-34046?

CVE-2023-34046 is a medium-severity vulnerability in Apple Mac OS X, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.7/10. Published 2023-10-20.

How severe is CVE-2023-34046?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Vulnerability in Apple Mac OS X

CVE-2023-34046

VMware Fusion(13.x prior to 13.5) contains a TOCTOU (Time-of-check Time-of-use) vulnerability that occurs during installation for the first time (the user needs to drag or copy the application to a folder from the '.dmg' volume) or when installing an upgrade. A malicious actor with local non-administrative user privileges may exploit this vulnerability to escalate privileges to root on the system where Fusion is installed or being installed for the first time.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2023-10-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Apple Mac OS X
VMware Fusion — versions 13.x

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

www.vmware.com/security/advisories/VMSA-2023-0022.html (Vendor Advisory)

Frequently asked questions

What is CVE-2023-34046?: CVE-2023-34046 is a medium-severity vulnerability in Apple Mac OS X, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.7/10. Published 2023-10-20.
How severe is CVE-2023-34046?: Medium severity. CVSS v3 base score is 6.7 out of 10.