CVE-2021-39657 Information disclosure in Android
A missing bounds check in the Android kernel UFS driver allows local attackers with system privileges to read out-of-bounds memory, 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-2021-39657?
CVE-2021-39657 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 ufshcd_eh_device_reset_handler of ufshcd.c, there is a possible out of bounds read due to a missing bounds check. 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-194696049References: Upstream kernel
Weakness: CWE-125
Which versions are affected by CVE-2021-39657?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-39657?
Apply the vendor's patch.
Is CVE-2021-39657 being exploited?
There is no known exploitation of CVE-2021-39657 in the wild and no public exploit code.
Other vulnerabilities in Google Android
Sources
Also known as A-194696049, DEBIAN-CVE-2021-39657, GHSA-rpgq-c954-jmg6, PUB-A-194696049, UBUNTU-CVE-2021-39657.