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CVE-2023-20938

HighPublished

In binder_transaction_buffer_release of binder.c, there is a possible use after free due to improper input validation. This could lead to local escalation...

Published: Feb 28, 2023
Updated: Aug 2, 2024
Assigning CNA: google_android
Evidence observed: Aug 8, 2026

Primary CVSS

8.1/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 26.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

In binder_transaction_buffer_release of binder.c, there is a possible use after free due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-257685302References: Upstream kernel

Sources

CVE-2023-20938-PublicPoC
A bug trigger for CVE-2023-20938 for Android Binder.
CVE-2023-20938-pocExploit
Local privilege escalation proof-of-concept for CVE-2023-20938, a use-after-free in Android binder, achieving root and disabling SELinux on vulnerable test builds.
CVE-2023-20938PoC
Technical analysis and proof-of-concept exploit for CVE-2023-20938, a use-after-free vulnerability in the Android kernel's Binder driver, enabling local privilege escalation.

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