What is CVE-2023-23531?

CVE-2023-23531 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Write. CVSS score: 8.6/10. Published 2023-02-27.

How severe is CVE-2023-23531?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2023-23531 known to be exploited?

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

Buffer overflow in Apple iOS And Ipados

CVE-2023-23531

The issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.2, iOS 16.3 and iPadOS 16.3. An app may be able to execute arbitrary code out of its sandbox or with certain elevated privileges.

Vulnerability class: Buffer Overflow

Published 2023-02-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.1th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Apple iOS And Ipados — versions unspecified
Apple Ipados
Apple Iphone OS
Apple macOS — versions unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

support.apple.com/en-us/HT213606 (Vendor Advisory)
support.apple.com/en-us/HT213605 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-23531?: CVE-2023-23531 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Write. CVSS score: 8.6/10. Published 2023-02-27.
How severe is CVE-2023-23531?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2023-23531 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.