CVE-2021-39680 Information disclosure in Android
A local attacker with system privileges can read uninitialized heap data in the Android kernel's SHA256 implementation, leading to information disclosure.
- 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-2021-39680?
CVE-2021-39680 is a medium-severity vulnerability in Google Android, published on 14 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In sec_SHA256_Transform of sha256_core.c, there is a possible way to read heap data due to uninitialized data. 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-197965864References: N/A
Weakness: CWE-908
Which versions are affected by CVE-2021-39680?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-39680?
Apply the vendor's patch.
Is CVE-2021-39680 being exploited?
There is no known exploitation of CVE-2021-39680 in the wild and no public exploit code.
Other vulnerabilities in Google Android
Sources
Also known as A-197965864, GHSA-6jfc-jv5m-vxv3, PUB-A-197965864.