CVE-2021-0540 Memory corruption in Android
A missing bounds check in Android's HAL wrapper allows local attackers with system privileges to escalate privileges via out-of-bounds write.
- 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-2021-0540?
CVE-2021-0540 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 halWrapperDataCallback of hal_wrapper.cc, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-169328517
Weakness: CWE-787
Which versions are affected by CVE-2021-0540?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2021-0540?
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-2021-0540 being exploited?
There is no known exploitation of CVE-2021-0540 in the wild and no public exploit code.
Other vulnerabilities in Google Android
Sources
Also known as A-169328517, GHSA-3pjq-2qm6-rh2c, PUB-A-169328517.