CVE-2022-21774 Use after free in MT6761, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6875, MT6877, MT6879, MT6885, MT6893, MT6895, MT6983

Medium 6.7 Published 6 Jul 2022 Updated 3 Aug 2024

A race condition in the MediaTek TEEI driver allows local attackers with system privileges to achieve privilege escalation via a use-after-free vulnerability.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-21774?

CVE-2022-21774 is a medium-severity use after free vulnerability in Google Android, published on 6 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In TEEI driver, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS06641447; Issue ID: ALPS06641447.

Weakness: CWE-362

Which versions are affected by CVE-2022-21774?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2022-21774?

No fix has been published for CVE-2022-21774 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2022-21774 being exploited?

There is no known exploitation of CVE-2022-21774 in the wild and no public exploit code.

All Google Android vulnerabilities

Sources

Also known as GHSA-v9x2-v49g-3v4c.