tvOS 17.6 Security Update

What tvOS 17.6 Fixes

tvOS 17.6, released July 29, 2024, fixes 22 vulnerabilities in 9 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 17.6 a routine security update: worth installing soon, not an emergency.

It is the newest security release for tvOS 17 on Apple's list.

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

Which Devices Get tvOS 17.6

Apple lists tvOS 17.6 for: Apple TV HD and Apple TV 4K (all models).

How to Install tvOS 17.6

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 17.6 there is nothing to do.

Every Fix in tvOS 17.6

All 22 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.

• Kernel

  A local attacker may be able to determine kernel memory layout

  An information disclosure issue was addressed with improved private data redaction for log entries.

  CVE-2024-27863

• AppleMobileFileIntegrity

  An app may be able to bypass Privacy preferences

  A downgrade issue was addressed with additional code-signing restrictions.

  CVE-2024-40774

• dyld

  A malicious attacker with arbitrary read and write capability may be able to bypass Pointer Authentication

  A race condition was addressed with additional validation.

  CVE-2024-40815

• Family Sharing

  An app may be able to read sensitive location information

  This issue was addressed with improved data protection.

  CVE-2024-40795

• libxpc

  An app may be able to bypass Privacy preferences

  A permissions issue was addressed with additional restrictions.

  CVE-2024-40805

• Sandbox

  An app may be able to bypass Privacy preferences

  This issue was addressed through improved state management.

  CVE-2024-40824

• WebKit

  A user may be able to bypass some web content restrictions

  An issue in the handling of URL protocols was addressed with improved logic.

  CVE-2024-44206

• CoreGraphics

  Processing a maliciously crafted file may lead to unexpected app termination

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

  CVE-2024-40799

• ImageIO

  Processing an 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-2023-6277 CVE-2023-52356

• 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-2024-40806

• ImageIO

  Processing a maliciously crafted file may lead to unexpected app termination

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

  CVE-2024-40777

• ImageIO

  Processing a maliciously crafted file may lead to unexpected app termination

  An integer overflow was addressed with improved input validation.

  CVE-2024-40784

• WebKit

  Processing web content may lead to a denial-of-service

  The issue was addressed with improved memory handling.

  CVE-2024-54551

• WebKit

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

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2024-40779 CVE-2024-40780

• WebKit

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

  A use-after-free issue was addressed with improved memory management.

  CVE-2024-40776 CVE-2024-40782

• WebKit

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

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

  CVE-2024-40789

• WebKit

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

  The issue was addressed with improved checks.

  CVE-2024-44185

• Kernel

  A local attacker may be able to cause unexpected system shutdown

  A type confusion issue was addressed with improved memory handling.

  CVE-2024-40788

• WebKit

  Processing maliciously crafted web content may lead to a cross site scripting attack

  This issue was addressed with improved checks.

  CVE-2024-40785

tvOS 17 Security Release History

tvOS 17.6 in context: the security releases Apple has published for tvOS 17, 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