CVE-2023-42940

Severity: medium (CVSS 5.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-19 · updated 2026-06-17
Weakness: CWE-200

Description

A session rendering issue was addressed with improved session tracking. This issue is fixed in macOS Sonoma 14.2.1. A user who shares their screen may unintentionally share the incorrect content.

Affected products

Apple macOS: from 14.0 before 14.2.1 — fixed in 14.2.1

How to fix

Upgrade to a fixed version: Apple macOS 14.2.1. Check the vendor advisory for mitigations.

References

http://seclists.org/fulldisclosure/2023/Dec/20
https://support.apple.com/en-us/HT214048
http://seclists.org/fulldisclosure/2023/Dec/20
https://support.apple.com/en-us/HT214048
https://support.apple.com/kb/HT214048

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