CVE-2021-0956 Memory corruption in Android
An out-of-bounds write in Android's NFC tag discovery allows remote attackers to escalate privileges and execute code without user interaction.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-0956?
CVE-2021-0956 is a critical memory corruption vulnerability in Google Android, published on 15 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In NfcTag::discoverTechnologies (activation) of NfcTag.cpp, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote escalation of privilege with no additionalSystem execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-12Android ID: A-189942532
Weakness: CWE-787
Which versions are affected by CVE-2021-0956?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-0956?
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-2021-0956 being exploited?
There is no known exploitation of CVE-2021-0956 in the wild and no public exploit code.
Other vulnerabilities in Google Android
Sources
Also known as A-189942532, ASB-A-189942532, GHSA-jvq6-xpq3-8mch.