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APPLE-SA-2022-05-16-6 tvOS 15.5

tvOS 15.5 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/HT213254.

AppleAVD
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A use after free issue was addressed with improved
memory management.
CVE-2022-26702: an anonymous researcher

AppleAVD
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges. Apple is aware of a report that this issue may
have been actively exploited.
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2022-22675: an anonymous researcher

AuthKit
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: A local user may be able to enable iCloud Photos without
authentication
Description: An authentication issue was addressed with improved
state management.
CVE-2022-26724:  Jorge A. Caballero (@DataDrivenMD)

AVEVideoEncoder
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2022-26736: an anonymous researcher
CVE-2022-26737: an anonymous researcher
CVE-2022-26738: an anonymous researcher
CVE-2022-26739: an anonymous researcher
CVE-2022-26740: an anonymous researcher

DriverKit
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: A malicious application may be able to execute arbitrary code
with system privileges
Description: An out-of-bounds access issue was addressed with
improved bounds checking.
CVE-2022-26763: Linus Henze of Pinauten GmbH (pinauten.de)

ImageIO
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: A remote attacker may be able to cause unexpected application
termination or arbitrary code execution
Description: An integer overflow was addressed with improved input
validation.
CVE-2022-26711: actae0n of Blacksun Hackers Club working with Trend
Micro Zero Day Initiative

IOKit
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A race condition was addressed with improved locking.
CVE-2022-26701: chenyuwang (@mzzzz__) of Tencent Security Xuanwu Lab

IOMobileFrameBuffer
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A memory corruption issue was addressed with improved
state management.
CVE-2022-26768: an anonymous researcher

IOSurfaceAccelerator
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: A malicious application may be able to execute arbitrary code
with kernel privileges
Description: A memory corruption issue was addressed with improved
state management.
CVE-2022-26771: an anonymous researcher

Kernel
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A memory corruption issue was addressed with improved
validation.
CVE-2022-26714: Peter Nguyễn Vũ Hoàng (@peternguyen14) of STAR Labs
(@starlabs_sg)

Kernel
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A use after free issue was addressed with improved
memory management.
CVE-2022-26757: Ned Williamson of Google Project Zero

Kernel
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: An attacker that has already achieved kernel code execution
may be able to bypass kernel memory mitigations
Description: A memory corruption issue was addressed with improved
validation.
CVE-2022-26764: Linus Henze of Pinauten GmbH (pinauten.de)

Kernel
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: A malicious attacker with arbitrary read and write capability
may be able to bypass Pointer Authentication
Description: A race condition was addressed with improved state
handling.
CVE-2022-26765: Linus Henze of Pinauten GmbH (pinauten.de)

LaunchServices
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: A sandboxed process may be able to circumvent sandbox
restrictions
Description: An access issue was addressed with additional sandbox
restrictions on third-party applications.
CVE-2022-26706: Arsenii Kostromin (0x3c3e)

libxml2
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: A remote attacker may be able to cause unexpected application
termination or arbitrary code execution
Description: A use after free issue was addressed with improved
memory management.
CVE-2022-23308

Security
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: A malicious app may be able to bypass signature validation
Description: A certificate parsing issue was addressed with improved
checks.
CVE-2022-26766: Linus Henze of Pinauten GmbH (pinauten.de)

WebKit
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: Processing maliciously crafted web content may lead to code
execution
Description: A memory corruption issue was addressed with improved
state management.
WebKit Bugzilla: 238178
CVE-2022-26700: ryuzaki

WebKit
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A use after free issue was addressed with improved
memory management.
WebKit Bugzilla: 236950
CVE-2022-26709: Chijin Zhou of ShuiMuYuLin Ltd and Tsinghua
wingtecher lab
WebKit Bugzilla: 237475
CVE-2022-26710: Chijin Zhou of ShuiMuYuLin Ltd and Tsinghua
wingtecher lab
WebKit Bugzilla: 238171
CVE-2022-26717: Jeonghoon Shin of Theori

WebKit
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: Processing maliciously crafted web content may lead to
arbitrary code execution
Description: A memory corruption issue was addressed with improved
state management.
WebKit Bugzilla: 238183
CVE-2022-26716: SorryMybad (@S0rryMybad) of Kunlun Lab
WebKit Bugzilla: 238699
CVE-2022-26719: Dongzhuo Zhao working with ADLab of Venustech

Wi-Fi
Available for: Apple TV 4K, Apple TV 4K (2nd generation), and Apple
TV HD
Impact: A malicious application may disclose restricted memory
Description: A memory corruption issue was addressed with improved
validation.
CVE-2022-26745: an anonymous researcher

Additional recognition

AppleMobileFileIntegrity
We would like to acknowledge Wojciech Reguła (@_r3ggi) of SecuRing
for their assistance.

WebKit
We would like to acknowledge James Lee, an anonymous researcher for
their assistance.

Apple TV will periodically check for software updates. Alternatively,
you may manually check for software updates by selecting "Settings ->
System -> Software Update -> Update Software."  To check the current
version of software, select "Settings -> General -> About."
All information is also posted on the Apple Security Updates
web site: https://support.apple.com/en-us/HT201222.

This message is signed with Apple's Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/
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