tvOS 17.3 Security Update

What tvOS 17.3 Fixes

tvOS 17.3, released January 22, 2024, fixes 12 vulnerabilities in 9 parts of the system, according to Apple's security advisory.

Apple says one of these flaws — CVE-2024-23222 — may already have been exploited. That makes tvOS 17.3 an update to install now rather than at the weekend.

It has since been superseded: the newest security release for tvOS 17 is tvOS 17.6, from July 29, 2024, which includes these fixes.

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

Exploited Before the Fix

Apple flags a fix as possibly exploited when it has a credible report that the flaw was used against real people before the patch. This one is the reason to update today.

• WebKit Exploited

  Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited.

  A type confusion issue was addressed with improved checks.

  CVE-2024-23222

Which Devices Get tvOS 17.3

Apple lists tvOS 17.3 for: Apple TV HD and Apple TV 4K (all models).

How to Install tvOS 17.3

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 17.3 there is nothing to do.

Every Fix in tvOS 17.3

The rest of Apple's advisory — every fix not already listed above, 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.

• Apple Neural Engine

  An app may be able to execute arbitrary code with kernel privileges

  The issue was addressed with improved memory handling.

  CVE-2024-23212

• Kernel

  An app may be able to execute arbitrary code with kernel privileges

  The issue was addressed with improved memory handling.

  CVE-2024-23208

• WebKit

  Processing web content may lead to arbitrary code execution

  The issue was addressed with improved memory handling.

  CVE-2024-23213

• CoreCrypto

  An attacker may be able to decrypt legacy RSA PKCS#1 v1.5 ciphertexts without having the private key

  A timing side-channel issue was addressed with improvements to constant-time computation in cryptographic functions.

  CVE-2024-23218

• NSSpellChecker

  An app may be able to access sensitive user data

  A privacy issue was addressed with improved handling of files.

  CVE-2024-23223

• TCC

  An app may be able to access user-sensitive data

  An issue was addressed with improved handling of temporary files.

  CVE-2024-23215

• WebKit

  A malicious website may cause unexpected cross-origin behavior

  A logic issue was addressed with improved checks.

  CVE-2024-23271

• libxpc

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

  A permissions issue was addressed with additional restrictions.

  CVE-2024-23201

• Power Manager

  An app may be able to corrupt coprocessor memory

  The issue was addressed with improved checks.

  CVE-2024-27791

• Time Zone

  An app may be able to view a user's phone number in system logs

  This issue was addressed with improved redaction of sensitive information.

  CVE-2024-23210

• WebKit

  A maliciously crafted webpage may be able to fingerprint the user

  An access issue was addressed with improved access restrictions.

  CVE-2024-23206

tvOS 17 Security Release History

tvOS 17.3 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