CVE-2021-0556 Memory corruption in Android
A heap buffer overflow in Android's fastcodemb.cpp allows local attackers to read sensitive memory without user interaction or elevated privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-0556?
CVE-2021-0556 is a medium-severity memory corruption vulnerability in Google Android, published on 22 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In getBlockSum of fastcodemb.cpp, there is a possible out of bounds read due to a heap buffer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-172716941
Weakness: CWE-125
Which versions are affected by CVE-2021-0556?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-0556?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-0556 being exploited?
There is no known exploitation of CVE-2021-0556 in the wild and no public exploit code.
Other vulnerabilities in Google Android
Sources
Also known as A-172716941, GHSA-c448-842q-vf3p, PUB-A-172716941.