CVE-2022-20368

What it actually does

Local privilege escalation in the Android kernel via use-after-free or PIE stack buffer corruption, enabling a process with limited privileges to corrupt kernel memory and obtain arbitrary code execution with full system privileges.

Why it matters to the business

Compromised Android devices can have their data stolen, apps modified, or the device fully controlled by an attacker; the issue remains relevant across the large installed base of older Android devices despite the age of the disclosure.

How an attack unfolds

An attacker crafts a malicious application that triggers the kernel flaw, leverages the resulting memory corruption to bypass protections, and escalates to root-level access on the device.

How to fix it

Apply the latest Android security patches that incorporate the upstream kernel fixes for A-224546354; where patches are unavailable, isolate affected devices and restrict untrusted application installation.

How to confirm the fix worked

Verify that devices are running a patched Android build containing the upstream kernel commit referenced by A-224546354 and confirm the absence of the vulnerable code paths through kernel version checks or binary analysis.

Typical attack path

1. Deliver malicious application to the target device
2. Execute the app to trigger the kernel vulnerability
3. Exploit memory corruption to gain kernel code execution
4. Elevate privileges and establish persistence or exfiltrate data

How to detect it

Review system and kernel logs for crashes or anomalies around the vulnerable kernel subsystems, and inspect for unexpected privilege changes or new root processes on Android devices.

What your security team should do

• Prioritize deployment of Android security updates to all managed devices
• Restrict sideloading and untrusted app sources on older Android releases
• Monitor endpoint detection tools for anomalous kernel behavior on Android fleets