CVE-2023-20835 Use after free in MT6895, MT6983, MT8188, MT8195, MT8395, MT8781

Medium 6.4 Published 4 Sep 2023 Updated 21 Oct 2024

A race condition in MediaTek camera subsystem allows local attackers with system privileges to achieve privilege escalation via use-after-free.

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-2023-20835?

CVE-2023-20835 is a medium-severity use after free vulnerability in Google Android, published on 4 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In camsys, 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: ALPS07341261; Issue ID: ALPS07326570.

Weakness: CWE-416, CWE-362

Which versions are affected by CVE-2023-20835?

It affects 3 products.

Products include Google Android, Linuxfoundation Yocto, Mediatek Iot Yocto.

How do I fix CVE-2023-20835?

No fix has been published for CVE-2023-20835 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-2023-20835 being exploited?

There is no known exploitation of CVE-2023-20835 in the wild and no public exploit code.

All Google Android vulnerabilities

Sources

Also known as GHSA-h64c-gqh4-8rr8.