Apple today released macOS Big Sur 11.3.1, which the company says “provides important security updates.” The release comes one week following the release of macOS Big Sur 11.3.
The macOS Big Sur 11.3.1 update is free and can be downloaded on all compatible Macs using the Software Update section of System Preferences.
macOS Big Sur 11.3.1 provides important security updates and is recommended for all users.
WebKit
Available for: macOS Big Sur
Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Description: A memory corruption issue was addressed with improved state management.
CVE-2021-30665: yangkang (@dnpushme)&zerokeeper&bianliang of 360 ATA
WebKit
Available for: macOS Big Sur
Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Description: An integer overflow was addressed with improved input validation.
CVE-2021-30663: an anonymous researcher
