What is CVE-2023-27946?

CVE-2023-27946 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2023-05-08.

How severe is CVE-2023-27946?

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

Out-of-bounds Read in Apple iOS And Ipados

CVE-2023-27946

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Ventura 13.3, iOS 15.7.4 and iPadOS 15.7.4, macOS Monterey 12.6.4, macOS Big Sur 11.7.5. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.

Vulnerability class: Buffer Overflow

Published 2023-05-08 · 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: 0.003 (15.3th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

support.apple.com/en-us/HT213670 (Vendor Advisory)
support.apple.com/en-us/HT213677 (Vendor Advisory)
support.apple.com/en-us/HT213675 (Vendor Advisory)
support.apple.com/en-us/HT213673 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-27946?: CVE-2023-27946 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2023-05-08.
How severe is CVE-2023-27946?: High severity. CVSS v3 base score is 7.8 out of 10.