What’s Vulnerable › Vulnerabilities

CVE-2023-40396

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-29 · updated 2026-06-17
• Weakness: CWE-77

Description

The issue was addressed with improved memory handling. This issue is fixed in iOS 17 and iPadOS 17, macOS Sonoma 14, watchOS 10, tvOS 17. An app may be able to execute arbitrary code with kernel privileges.

Affected products

• Apple iPadOS: before 17.0 — fixed in 17.0
• Apple Iphone Os: before 17.0 — fixed in 17.0
• Apple macOS: before 14.0 — fixed in 14.0
• Apple tvOS: before 17.0 — fixed in 17.0
• Apple watchOS: before 10.0 — fixed in 10.0

How to fix

Upgrade to a fixed version: Apple iPadOS 17.0; Apple Iphone Os 17.0; Apple macOS 14.0; Apple tvOS 17.0; Apple watchOS 10.0. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT213936
• https://support.apple.com/en-us/HT213937
• https://support.apple.com/en-us/HT213938
• https://support.apple.com/en-us/HT213940
• https://support.apple.com/en-us/HT213936
• https://support.apple.com/en-us/HT213937
• https://support.apple.com/en-us/HT213938
• https://support.apple.com/en-us/HT213940

Get alerted when CVE-2023-40396 or the next vulnerability affects your stack