CVE-2023-20849 Use after free in MT2713, MT6895, MT6897, MT6983, MT8188, MT8195, MT8395, MT8781

What is CVE-2023-20849?

CVE-2023-20849 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, and only if a user opens a file or follows a link.

Official description

In imgsys_cmdq, there is a possible use after free due to a missing valid range checking. This could lead to local escalation of privilege with System execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS07340433; Issue ID: ALPS07340350.

Weakness: CWE-416

Which versions are affected by CVE-2023-20849?

It affects 4 products.

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

How do I fix CVE-2023-20849?

No fix has been published for CVE-2023-20849 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-2023-20849 being exploited?

There is no known exploitation of CVE-2023-20849 in the wild and no public exploit code.

Other vulnerabilities in Google Android

• CVE-2026-58704 Google Pixel Improper Authorization Exploited High 8.8
• CVE-2025-48543 Android Runtime Use-After-Free Exploited High 8.8
• CVE-2023-35674 Android Framework Privilege Escalation Exploited High 8.8
• CVE-2025-48595 Android Framework Integer Overflow Exploited High 8.4
• CVE-2024-32896 Android Pixel Privilege Escalation Exploited High 8.1

All Google Android vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-fcm2-qhf9-7wvv.