tvOS 18 Security Update

What tvOS 18 Fixes

tvOS 18, released September 16, 2024, fixes 15 vulnerabilities in 11 parts of the system, according to Apple's security advisory.

Apple does not say that any of them were exploited before the fix. That makes tvOS 18 a routine security update: worth installing soon, not an emergency.

It has since been superseded: the newest security release for tvOS 18 is tvOS 18.6, from July 29, 2025, which includes these fixes.

Grouped by us from the impact Apple gives for each fix; the impact lines below are Apple's own.

Which Devices Get tvOS 18

Apple lists tvOS 18 for: Apple TV HD and Apple TV 4K (all models).

How to Install tvOS 18

On the Apple TV, open Settings → System → Software Updates.

Security fixes are cumulative: any later release for the same version includes these as well, so if you are already past tvOS 18 there is nothing to do.

Every Fix in tvOS 18

All 15 CVEs in Apple's advisory, the most serious kinds first. Each entry is the part of the system affected, Apple's description of the impact and the fix, and the CVE ID.

• Game Center

  An app may be able to access user-sensitive data

  A file access issue was addressed with improved input validation.

  CVE-2024-40850

• WebKit

  A malicious website may exfiltrate data cross-origin

  A cookie management issue was addressed with improved state management.

  CVE-2024-54467

• WebKit

  A malicious website may exfiltrate data cross-origin

  A cross-origin issue existed with "iframe" elements. This was addressed with improved tracking of security origins.

  CVE-2024-44187

• ImageIO

  Processing a maliciously crafted file may lead to unexpected app termination

  An out-of-bounds read issue was addressed with improved input validation.

  CVE-2024-27880

• ImageIO

  Processing an image may lead to a denial-of-service

  An out-of-bounds access issue was addressed with improved bounds checking.

  CVE-2024-44176

• IOSurfaceAccelerator

  An app may be able to cause unexpected system termination

  The issue was addressed with improved memory handling.

  CVE-2024-44169

• libxml2

  Processing maliciously crafted web content may lead to an unexpected process crash

  An integer overflow was addressed through improved input validation.

  CVE-2024-44198

• mDNSResponder

  An app may be able to cause a denial-of-service

  A logic error was addressed with improved error handling.

  CVE-2024-44183

• Model I/O

  Processing a maliciously crafted image may lead to a denial-of-service

  This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org.

  CVE-2023-5841

• SceneKit

  Processing a maliciously crafted file may lead to unexpected app termination

  A buffer overflow was addressed with improved size validation.

  CVE-2024-44144

• WebKit

  Processing maliciously crafted web content may lead to an unexpected process crash

  The issue was addressed with improved checks.

  CVE-2024-44192

• Kernel

  An app may gain unauthorized access to Bluetooth

  This issue was addressed through improved state management.

  CVE-2024-44191

• LaunchServices

  A malicious app may be able to modify other apps without having App Management permission

  A logic issue was addressed with improved checks.

  CVE-2024-54560

• WebKit

  Processing maliciously crafted web content may lead to universal cross site scripting

  This issue was addressed through improved state management.

  CVE-2024-40857

• Wi-Fi

  An attacker may be able to force a device to disconnect from a secure network

  An integrity issue was addressed with Beacon Protection.

  CVE-2024-40856

tvOS 18 Security Release History

tvOS 18 in context: the security releases Apple has published for tvOS 18, newest first, with the number of fixes each carried.

The Same Fixes Elsewhere

Apple ships most fixes to every platform that shares the code, and to older versions still under support. These releases close at least one of the same CVEs:

Frequently Asked Questions