CVE-2021-0519

HIGH

Android - Out-of-bounds Write in BITSTREAM_FLUSH

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-0519. PoCs published by nanopathi.

AI-analyzed exploit summary This repository contains source code files from the Android Open Source Project (AOSP) related to CVE-2021-0519, specifically focusing on buffer management in the libavc library. The code includes implementations of buffer management functions but does not contain an exploit or proof-of-concept code.

Description

In BITSTREAM_FLUSH of ih264e_bitstream.h, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-8.1 Android-9Android ID: A-176533109

Exploits (1)

nomisec WRITEUP
by nanopathi · poc
https://github.com/nanopathi/external_libavc_AOSP10_r33_CVE-2021-0519

This repository contains source code files from the Android Open Source Project (AOSP) related to CVE-2021-0519, specifically focusing on buffer management in the libavc library. The code includes implementations of buffer management functions but does not contain an exploit or proof-of-concept code.

Classification
Writeup 90%
Attack Type
Other
Complexity
Moderate
Reliability
Theoretical
Target: Android Open Source Project (AOSP) libavc library
No auth needed
Prerequisites: Access to vulnerable Android device with affected libavc library
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://source.android.com/security/bulletin/2021-08-01

Scores

CVSS v3 7.8
EPSS 0.0024
EPSS Percentile 14.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (4)
google/android 8.1
google/android 9.0
google/android 10.0
google/android 11.0
Published Aug 17, 2021
Tracked Since Feb 18, 2026