CVE-2021-39647 Race condition in Android
A race condition in the Android kernel allows local attackers with system privileges to disclose sensitive information via improper locking in TEE initialization.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-39647?
CVE-2021-39647 is a medium-severity vulnerability in Google Android, published on 15 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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
Weakness: CWE-667
Which versions are affected by CVE-2021-39647?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-39647?
Apply the vendor's patch.
Is CVE-2021-39647 being exploited?
There is no known exploitation of CVE-2021-39647 in the wild and no public exploit code.
Other vulnerabilities in Google Android
Sources
Also known as A-198713939, GHSA-2r4h-m59f-x4w8, PUB-A-198713939.