-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 APPLE-SA-03-24-2026-7 watchOS 26.4 watchOS 26.4 addresses the following issues. Information about the security content is also available at https://support.apple.com/126798. Apple maintains a Security Releases page at https://support.apple.com/100100 which lists recent software updates with security advisories. 802.1X Available for: Apple Watch Series 6 and later Impact: An attacker in a privileged network position may be able to intercept network traffic Description: An authentication issue was addressed with improved state management. CVE-2026-28865: Héloïse Gollier and Mathy Vanhoef (KU Leuven) Accounts Available for: Apple Watch Series 6 and later Impact: An app may be able to access sensitive user data Description: An authorization issue was addressed with improved state management. CVE-2026-28877: Rosyna Keller of Totally Not Malicious Software Audio Available for: Apple Watch Series 6 and later Impact: Processing maliciously crafted web content may lead to an unexpected process crash Description: A use-after-free issue was addressed with improved memory management. CVE-2026-28879: Justin Cohen of Google Audio Available for: Apple Watch Series 6 and later Impact: An attacker may be able to cause unexpected app termination Description: A type confusion issue was addressed with improved memory handling. CVE-2026-28822: Jex Amro CoreMedia Available for: Apple Watch Series 6 and later Impact: Processing an audio stream in a maliciously crafted media file may terminate the process Description: An out-of-bounds access issue was addressed with improved bounds checking. CVE-2026-20690: Hossein Lotfi (@hosselot) of Trend Micro Zero Day Initiative CoreUtils Available for: Apple Watch Series 6 and later Impact: A user in a privileged network position may be able to cause a denial-of-service Description: A null pointer dereference was addressed with improved input validation. CVE-2026-28886: Etienne Charron (Renault) and Victoria Martini (Renault) Crash Reporter Available for: Apple Watch Series 6 and later Impact: An app may be able to enumerate a user's installed apps Description: A privacy issue was addressed by removing sensitive data. CVE-2026-28878: Zhongcheng Li from IES Red Team curl Available for: Apple Watch Series 6 and later Impact: An issue existed in curl which may result in unintentionally sending sensitive information via an incorrect connection Description: 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-2025-14524 GeoServices Available for: Apple Watch Series 6 and later Impact: An app may be able to access sensitive user data Description: An information leakage was addressed with additional validation. CVE-2026-28870: XiguaSec ImageIO Available for: Apple Watch Series 6 and later Impact: Processing a maliciously crafted file may lead to unexpected app termination Description: 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-2025-64505 Kernel Available for: Apple Watch Series 6 and later Impact: An app may be able to disclose kernel memory Description: A logging issue was addressed with improved data redaction. CVE-2026-28868: 이동하 (Lee Dong Ha of BoB 0xB6) Kernel Available for: Apple Watch Series 6 and later Impact: An app may be able to leak sensitive kernel state Description: This issue was addressed with improved authentication. CVE-2026-28867: Jian Lee (@speedyfriend433) Kernel Available for: Apple Watch Series 6 and later Impact: An app may be able to cause unexpected system termination or corrupt kernel memory Description: The issue was addressed with improved memory handling. CVE-2026-20698: DARKNAVY (@DarkNavyOrg) Kernel Available for: Apple Watch Series 6 and later Impact: An app may be able to cause unexpected system termination or write kernel memory Description: A use after free issue was addressed with improved memory management. CVE-2026-20687: Johnny Franks (@zeroxjf) libxpc Available for: Apple Watch Series 6 and later Impact: An app may be able to enumerate a user's installed apps Description: This issue was addressed with improved checks. CVE-2026-28882: Ilias Morad (A2nkF) of Voynich Group, Duy Trần (@khanhduytran0), @hugeBlack Sandbox Profiles Available for: Apple Watch Series 6 and later Impact: An app may be able to fingerprint the user Description: A permissions issue was addressed with additional restrictions. CVE-2026-28863: Gongyu Ma (@Mezone0) Security Available for: Apple Watch Series 6 and later Impact: A local attacker may gain access to user's Keychain items Description: This issue was addressed with improved permissions checking. CVE-2026-28864: Alex Radocea Siri Available for: Apple Watch Series 6 and later Impact: An attacker with physical access to a locked device may be able to view sensitive user information Description: The issue was addressed with improved authentication. CVE-2026-28856: an anonymous researcher UIFoundation Available for: Apple Watch Series 6 and later Impact: An app may be able to cause a denial-of-service Description: A stack overflow was addressed with improved input validation. CVE-2026-28852: Caspian Tarafdar WebKit Available for: Apple Watch Series 6 and later Impact: Processing maliciously crafted web content may prevent Content Security Policy from being enforced Description: This issue was addressed through improved state management. WebKit Bugzilla: 304951 CVE-2026-20665: webb WebKit Available for: Apple Watch Series 6 and later Impact: A malicious website may be able to process restricted web content outside the sandbox Description: The issue was addressed with improved memory handling. WebKit Bugzilla: 308248 CVE-2026-28859: greenbynox, Arni Hardarson WebKit Sandboxing Available for: Apple Watch Series 6 and later Impact: A maliciously crafted webpage may be able to fingerprint the user Description: An authorization issue was addressed with improved state management. WebKit Bugzilla: 306827 CVE-2026-20691: Gongyu Ma (@Mezone0) Additional recognition AirPort We would like to acknowledge Yashar Shahinzadeh, Saman Ebrahimnezhad, Amir Safari, Omid Rezaii for their assistance. Bluetooth We would like to acknowledge Hamid Mahmoud for their assistance. Captive Network We would like to acknowledge Kun Peeks (@SwayZGl1tZyyy) for their assistance. CloudAttestation We would like to acknowledge Suresh Sundaram, Willard Jansen for their assistance. CoreUI We would like to acknowledge Peter Malone for their assistance. Find My We would like to acknowledge Salemdomain for their assistance. GPU Drivers We would like to acknowledge Jian Lee (@speedyfriend433) for their assistance. ICU We would like to acknowledge Jian Lee (@speedyfriend433) for their assistance. Kernel We would like to acknowledge DARKNAVY (@DarkNavyOrg), Kylian Boulard De Pouqueville From Fuzzinglabs, Patrick Ventuzelo From Fuzzinglabs, Robert Tran, Suresh Sundaram for their assistance. libarchive We would like to acknowledge Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs, Arni Hardarson for their assistance. libc We would like to acknowledge Vitaly Simonovich for their assistance. Libnotify We would like to acknowledge Ilias Morad (@A2nkF_) for their assistance. LLVM We would like to acknowledge Nathaniel Oh (@calysteon) for their assistance. Messages We would like to acknowledge JZ for their assistance. MobileInstallation We would like to acknowledge Gongyu Ma (@Mezone0) for their assistance. ppp We would like to acknowledge Dave G. for their assistance. Quick Look We would like to acknowledge Wojciech Regula of SecuRing (wojciechregula.blog), an anonymous researcher for their assistance. Safari We would like to acknowledge @RenwaX23, Farras Givari, Syarif Muhammad Sajjad, Yair for their assistance. Shortcuts We would like to acknowledge Waleed Barakat (@WilDN00B) and Paul Montgomery (@nullevent) for their assistance. Siri We would like to acknowledge Anand Mallaya, Tech consultant, Anand Mallaya and Co., Harsh Kirdolia, Hrishikesh Parmar of Self-Employed for their assistance. Spotlight We would like to acknowledge Bilge Kaan Mızrak, Claude & Friends: Risk Analytics Research Group, Zack Tickman for their assistance. Time Zone We would like to acknowledge Abhay Kailasia (@abhay_kailasia) from Safran Mumbai India for their assistance. UIKit We would like to acknowledge AEC, Abhay Kailasia (@abhay_kailasia) from Safran Mumbai India, Bishal Kafle (@whoisbishal.k), Carlos Luna (U.S. Department of the Navy), Dalibor Milanovic, Daren Goodchild, JS De Mattei, Maxwell Garn, Zack Tickman, fuyuu12, incredincomp for their assistance. Wallet We would like to acknowledge Zhongcheng Li from IES Red Team of ByteDance for their assistance. Web Extensions We would like to acknowledge Carlos Jeurissen, Rob Wu (robwu.nl) for their assistance. WebKit We would like to acknowledge Vamshi Paili for their assistance. WebKit Process Model We would like to acknowledge Joseph Semaan for their assistance. Wi-Fi We would like to acknowledge Kun Peeks (@SwayZGl1tZyyy), an anonymous researcher for their assistance. Wi-Fi Connectivity We would like to acknowledge Alex Radocea of Supernetworks, Inc for their assistance. Widgets We would like to acknowledge Marcel Voß, Mitul Pranjay, Serok Çelik for their assistance. Instructions on how to update your Apple Watch software are available at https://support.apple.com/kb/HT204641 To check the version on your Apple Watch, open the Apple Watch app on your iPhone and select "My Watch > General > About". Alternatively, on your watch, select "My Watch > General > About". All information is also posted on the Apple Security Releases web site: https://support.apple.com/100100. This message is signed with Apple's Product Security PGP key, and details are available at: https://www.apple.com/support/security/pgp/ -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEhjkl+zMLNwFiCT1o4Ifiq8DH7PUFAmnDI0gACgkQ4Ifiq8DH 7PU5BBAAqUGF+tN9mIZSKdxPZeR4jQI9l+Er4lXyXzyYNi2vMAntYufDv6m+eucu IXNWqlUH3pVTn67Yu17oMAYU3edhhW0tARQRPf9iuCz2qYfR/v0U7PIbe+52rt7v xZBcA94xkofW6f55PWR17q7vklbAEy9xWLEbuBh9f3uSeOyIlQMineWykFWsXNEr ah2iyWOgGjfOi+e5N1V1bE2Op4zn227VkjvHdQt6YqiJ25uCJXaPF1sJOvKIwlQ0 T9sJjpbYrmkchJQsEyv0x2YPFEGae1jQX8ceOmROkgl5a3egRwNnrR5C1StoJg2s NaEjGMR0nZO+1CXFpprR7bsfu/W7YV1jQlrrZ/G68aYEO+eUD689EzHjOrxecL4V hUJDjbbOzVtw84/1+yjk/3zL+aaKRC3bLo4X1zpqeuZaUddCtnBDGpdNed91qtfD dMXIxoKG/YnP1WOnWCiOsIVSGbz1h8rqsknWpBXy48OvOgU2g67aCWC6D75w/YPW 9gjzEd1Xrz0ZzAT7qNGOX5ZWxzl4HSM1wTk4QgWHuFUY6AO6Bwv8WN7/pArkNrSN 8AocGOstA6P3eh+erbOB/uxU33wq0IBpuibciGntdnfemAYoQgOMbvRcJ9g0s1Kl yyBa7YMCA0xzidPqQeczmpNHX/rVsbxTTiHeJDNGKCbjc8nqY9o= =nvfM -----END PGP SIGNATURE----- _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: https://seclists.org/fulldisclosure/
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