CVE-2022-20154

What it actually does

Race condition in lock_sock_nested of sock.c leads to use-after-free, enabling local privilege escalation to system level.

Why it matters to the business

Attackers with existing system-level access on affected Android devices could obtain elevated control, increasing risk of data compromise or persistence on mobile endpoints; high ecosystem prevalence amplifies potential impact across many devices.

How an attack unfolds

An attacker with system execution privileges triggers the race condition in socket locking to cause a use-after-free, then leverages the freed memory for privilege escalation without user interaction.

How to fix it

Update to fixed kernel versions addressing A-174846563; apply patches from upstream references. No specific fixed versions listed for listed products.

How to confirm the fix worked

Verify kernel version includes the upstream fix for the race condition; test for absence of the vulnerability through code review or updated build checks.

Typical attack path

1. Obtain system-level access on target device
2. Trigger concurrent socket operations to hit race in lock_sock_nested
3. Exploit resulting use-after-free to corrupt kernel memory
4. Escalate to higher privileges for further actions

How to detect it

Inspect kernel logs and audit trails for unusual socket operations or memory corruption indicators around the lock_sock_nested function; review process execution for unexpected privilege changes post-exploitation attempts.

What your security team should do

• Prioritize patching Android kernel on all affected devices due to local EoP risk
• Monitor for any EPSS increases or new exploit reports despite low current score
• Review device inventory for Android kernel versions older than the published fix date