CVE-2021-39647

Name: CVE-2021-39647
Creator: NVD / NIST
Published: 2021-12-15T19:15:15.447+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.4/10EPSS 0.09%

Last modified Jun 17, 2026

CVE-2021-39647 is a medium-severity vulnerability rated 4.4/10 on the CVSS scale. In mon_smc_load_sp of gs101-sc/plat/samsung/exynos/soc/exynos9845/smc_booting.S, there is a possible reinitialization of TEE due to improper locking. This could lead to local information disclosure with System execution privileges needed. EPSS estimates a 0.09% chance of exploitation in the next 30 days.

Description

In mon_smc_load_sp of gs101-sc/plat/samsung/exynos/soc/exynos9845/smc_booting.S, there is a possible reinitialization of TEE due to improper locking. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-198713939References: N/A

Metrics

CVSS 3.1

4.4/10

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

EPSS Probability

0.09%

0.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-667

Affected Software

Vendor	Product	Versions
Google	Android	All versions

References

https://source.android.com/security/bulletin/pixel/2021-12-01Patch, Vendor Advisory
https://source.android.com/security/bulletin/pixel/2021-12-01Patch, Vendor Advisory

Timeline

Published: Dec 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39647?

How severe is CVE-2021-39647?

CVE-2021-39647 has a CVSS score of 4.4/10 (MEDIUM severity). The EPSS model estimates a 0.09% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39647?

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-2021-39647?

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

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Source: NVD / NIST