Memory corruption in macOS - CVE-2026-20609
Published: February 11, 2026
Vulnerability identifier: #VU122676
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-20609
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Apple Inc.
Affected software:
macOS
macOS
Detailed vulnerability description
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.
How to mitigate CVE-2026-20609
Install update from vendor's website.