CVE-2021-39681
In delete_protocol of main.c, there is a possible arbitrary code execution due to a use after...
In delete_protocol of main.c, there is a possible arbitrary code execution due to a use after free. 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-200251074References: N/A
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 delete_protocol of main.c, there is a possible arbitrary code execution due to a use after free. 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-200251074References: N/A
- Record
CVE-2021-39681- 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
- 4.6 Medium
AV:L/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-416
- Updated
- 2026-11-02
CVE List No score
In delete_protocol of main.c, there is a possible arbitrary code execution due to a use after free. 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-200251074References: N/A
- Record
CVE-2021-39681- Updated
- 2026-11-02
EUVDEUVD-2021-26038 No score
In delete_protocol of main.c, there is a possible arbitrary code execution due to a use after free. 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-200251074References: N/A
- Record
EUVD-2021-26038- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-f55c-c9jm-8544 No score
In delete_protocol of main.c, there is a possible arbitrary code execution due to a use after...
In delete_protocol of main.c, there is a possible arbitrary code execution due to a use after free. 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-200251074References: N/A
- Record
GHSA-f55c-c9jm-8544- Weakness
- CWE-416
- Updated
- 2026-11-02
OSVPUB-A-200251074 No score
In delete_protocol of main.c, there is a possible arbitrary code execution due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
- Record
PUB-A-200251074- Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
:unknown:Android |
pi:0 up to pi:2022-01-05, plus listed versions pi |
pi:2022-01-05 |
:unknown:Android |
qt:0 up to qt:2022-01-05, plus listed versions qt |
qt:2022-01-05 |
:unknown:Android |
rvc:0 up to rvc:2022-01-05, plus listed versions rvc |
rvc:2022-01-05 |
:unknown:Android |
rvc-qpr:0 up to rvc-qpr:2022-01-05, plus listed versions rvc-qpr |
rvc-qpr:2022-01-05 |
:unknown:Android |
sc:0 up to sc:2022-01-05, plus listed versions sc |
sc:2022-01-05 |
:unknown:Android |
sc-v2:0 up to sc-v2:2022-01-05, plus listed versions sc-v2 |
sc-v2:2022-01-05 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-39681 is a high vulnerability (CVSS 7.8) in Google Android, published January 1, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. Fixed in :unknown: pi:2022-01-05.