What is CVE-2023-28206?

CVE-2023-28206 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Write. CVSS score: 8.6/10. Published 2023-04-10.

How severe is CVE-2023-28206?

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

Is CVE-2023-28206 known to be exploited?

Yes. CVE-2023-28206 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-04-10), indicating it is being actively exploited. 12 public proof-of-concept repositories are indexed.

Buffer overflow in Apple iOS And Ipados

CVE-2023-28206

An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in macOS Monterey 12.6.5, iOS 16.4.1 and iPadOS 16.4.1, macOS Ventura 13.3.1, iOS 15.7.5 and iPadOS 15.7.5, macOS Big Sur 11.7.6. An app may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.

Vulnerability class: Buffer Overflow

Published 2023-04-10 · 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: 0.232 (97.8th percentile), scored 2026-10-19.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.230 · newest: 0.232 · change: +0.002

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

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-04-10. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-05-01.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

support.apple.com/en-us/HT213723 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT213725 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT213724 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT213721 (Release Notes, Vendor Advisory)
support.apple.com/en-us/HT213720 (Release Notes, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2023-28206?: CVE-2023-28206 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Write. CVSS score: 8.6/10. Published 2023-04-10.
How severe is CVE-2023-28206?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2023-28206 known to be exploited?: Yes. CVE-2023-28206 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-04-10), indicating it is being actively exploited. 12 public proof-of-concept repositories are indexed.