CVE-2021-39806

Name: CVE-2021-39806
Creator: NVD / NIST
Published: 2022-06-15T14:15:11.06+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.10%

Last modified Jun 17, 2026

CVE-2021-39806 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In closef of label_backends_android.c, there is a possible way to corrupt memory due to a double free. This could lead to local escalation of privilege during startup of servicemanager, if an attacker can trigger an initialization failure, with no additional execution privileges needed. EPSS estimates a 0.10% chance of exploitation in the next 30 days.

Description

In closef of label_backends_android.c, there is a possible way to corrupt memory due to a double free. This could lead to local escalation of privilege during startup of servicemanager, if an attacker can trigger an initialization failure, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-12LAndroid ID: A-215387420

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.10%

1.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-415

Affected Software

Vendor	Product	Versions
Google	Android	12.1

References

https://source.android.com/security/bulletin/pixel/2022-06-01Vendor Advisory
https://source.android.com/security/bulletin/pixel/2022-06-01Vendor Advisory

Timeline

Published: Jun 15, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39806?

How severe is CVE-2021-39806?

CVE-2021-39806 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.10% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39806?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-39806?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST