Memory corruption in macOS - CVE-2026-20609

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Main Vulnerability Database Vulnerabilities #VU122676

Memory corruption in macOS - CVE-2026-20609

Published: February 11, 2026


Vulnerability identifier: #VU122676
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20609
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in CoreMedia. A remote attacker can trick the victim into opening a specially crafted file and perform a denial-of-service or potentially disclose memory contents.


Affected software

macOS
visionOS
watchOS
tvOS
iPadOS
Apple iOS

How to mitigate CVE-2026-20609

Install update from vendor's website.

macOS - addressed in versions 26.3 25D125, 14.8.4 23J319, 15.7.4 24G517
visionOS - update to 26.3
watchOS - update to 26.3 23S620
tvOS - update to 26.3 23K620
iPadOS - addressed in versions 18.7.5 22H311, 26.3 23D127
Apple iOS - addressed in versions 18.7.5 22H311, 26.3 23D127

External References

Related Security Bulletins