What is CVE-2023-32356?

CVE-2023-32356 is a high-severity vulnerability in Apple macOS, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2023-09-06.

How severe is CVE-2023-32356?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Apple macOS

CVE-2023-32356

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.3. An app may be able to cause unexpected system termination or write kernel memory.

Vulnerability class: Buffer Overflow

Published 2023-09-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (14.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Apple macOS — versions unspecified

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

support.apple.com/en-us/HT213670 (Release Notes, Vendor Advisory)
support.apple.com/kb/HT213670 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2023-32356?: CVE-2023-32356 is a high-severity vulnerability in Apple macOS, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2023-09-06.
How severe is CVE-2023-32356?: High severity. CVSS v3 base score is 7.8 out of 10.