About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.
Safari 15
Released September 20, 2021
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing a maliciously crafted audio file may disclose restricted memory
Description: An out-of-bounds read was addressed with improved input validation.
CVE-2021-30836: Peter Nguyen Vu Hoang of STAR Labs
Entry added November 18, 2021
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: A malicious application may bypass Gatekeeper checks
Description: A logic issue was addressed with improved state management.
CVE-2021-30861: Ryan Pickren (ryanpickren.com), Wojciech Reguła (@_r3ggi)
Entry added November 18, 2021
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A type confusion issue was addressed with improved state handling.
CVE-2021-30818: Amar Menezes (@amarekano) of Zon8Research
Entry added October 25, 2021
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: An attacker in a privileged network position may be able to bypass HSTS
Description: A logic issue was addressed with improved restrictions.
CVE-2021-30823: David Gullasch of Recurity Labs
Entry added October 25, 2021
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A use after free issue was addressed with improved memory management.
CVE-2021-30809: an anonymous researcher
Entry added October 25, 2021
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A memory corruption issue was addressed with improved memory handling.
CVE-2021-30846: Sergei Glazunov of Google Project Zero
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to code execution
Description: A memory corruption issue was addressed with improved memory handling.
CVE-2021-30848: Sergei Glazunov of Google Project Zero
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: Multiple memory corruption issues were addressed with improved memory handling.
CVE-2021-30849: Sergei Glazunov of Google Project Zero
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to code execution
Description: A memory corruption vulnerability was addressed with improved locking.
CVE-2021-30851: Samuel Groß of Google Project Zero
WebRTC
Available for: macOS Big Sur and macOS Catalina
Impact: An attacker may be able to track users through their IP address
Description: A logic issue was addressed with improved state management.
CVE-2021-30930: Oguz Kırat, Matthias Keller (m-keller.com)
Entry added May 25, 2022, updated September 16, 2022
Additional recognition
WebKit
We would like to acknowledge Nikhil Mittal (@c0d3G33k) for their assistance.
Entry added November 18, 2021
WebRTC
We would like to acknowledge Matthias Keller (m-keller.com) for their assistance.
Entry added November 18, 2021