CVE-2021-39632 Memory corruption in Android
A local attacker can exploit an out-of-bounds write in Android's inotify callback to escalate privileges without user interaction.
- 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-2021-39632?
CVE-2021-39632 is a high-severity memory corruption 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 inotify_cb of events.cpp, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-12Android ID: A-202159709
Weakness: CWE-787
Which versions are affected by CVE-2021-39632?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-39632?
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-2021-39632 being exploited?
There is no known exploitation of CVE-2021-39632 in the wild and no public exploit code.
Other vulnerabilities in Google Android
Sources
Also known as A-202159709, ASB-A-202159709, GHSA-36fw-cxfr-92fm.