This month's Android security patch fixes Android runtime, Media framework, Android system and framework, Broadcom and Qualcomm components, and other critical vulnerabilities affecting Android system components.
In the security bulletin, "The most serious of these vulnerabilities is the high-risk security vulnerabilities in system components. Using specially crafted PAC files allows remote attackers to execute code that contains malicious escalation processes. The severity is based on The vulnerability could be assessed by the dangers that appear on the affected device."
The August 2019 Android security patch also brought more solid improvements and security fixes to all supported Pixel devices. In the Pixel Update Bulletin, released in August 2019, three vulnerabilities existed in Qualcomm components, including Pixel device closed source components, and improved sleep modes for Pixel 3a and Pixel 3a XL.
In addition, this month's Android security patch has improved WiFi network configuration for Pixel, Pixel XL, Pixel 2, Pixel 2 XL, Pixel 3, Pixel 3 XL, Pixel 3a and Pixel 3a XL, which improves the stability of Wi-Fi CaptivePortalLogin Sex.