CVE-2021-0519
In BITSTREAM_FLUSH of ih264e_bitstream.h, there is a possible out of bounds write due to a heap...
CVE-2021-0519 is a high vulnerability (CVSS 7.8) in Google Android, published August 1, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 15th percentile. Fixed in platform/external/libavc 8.1:2021-08-01.
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
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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
- Record
CVE-2021-0519- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.2 High
AV:L/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
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
- Record
CVE-2021-0519- Updated
- 2026-11-02
EUVDEUVD-2021-3138 No score
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
- Record
EUVD-2021-3138- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3x4v-r279-87fr No score
In BITSTREAM_FLUSH of ih264e_bitstream.h, there is a possible out of bounds write due to a heap...
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
- Record
GHSA-3x4v-r279-87fr- Weakness
- CWE-787
- Updated
- 2026-11-02
OSVASB-A-176533109 No score
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.
- Record
ASB-A-176533109- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
platform/external/libavcAndroid |
8.1:0 up to 8.1:2021-08-01, plus listed versions 8.1 |
8.1:2021-08-01 |
platform/external/libavcAndroid |
9:0 up to 9:2021-08-01, plus listed versions 9 |
9:2021-08-01 |
platform/external/libavcAndroid |
10:0 up to 10:2021-08-01, plus listed versions 10 |
10:2021-08-01 |
platform/frameworks/avAndroid |
10:0 up to 10:2021-08-01, plus listed versions 10 |
10:2021-08-01 |
platform/external/libavcAndroid |
11:0 up to 11:2021-08-01, plus listed versions 11 |
11:2021-08-01 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | nanopathi/external_libavc_AOSP10_r33_CVE-2021-0519 | 2022-04-21 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |