CVE-2012-4220 Null dereference in n/a

What is CVE-2012-4220?

CVE-2012-4220 is a medium-severity vulnerability in Google Android, published on 30 Nov 2012. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

diagchar_core.c in the Qualcomm Innovation Center (QuIC) Diagnostics (aka DIAG) kernel-mode driver for Android 2.3 through 4.2 allows attackers to execute arbitrary code or cause a denial of service (incorrect pointer dereference) via an application that uses crafted arguments in a local diagchar_ioctl call.

Which versions are affected by CVE-2012-4220?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2012-4220?

No fix has been published for CVE-2012-4220 yet. Limit exposure of the affected software until one is available.

Is CVE-2012-4220 being exploited?

There is no known exploitation of CVE-2012-4220 in the wild and no public exploit code.

Public exploit code: 2 proofs of concept on GitHub.

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• CVE-2023-35674 Android Framework Privilege Escalation Exploited High 8.8
• CVE-2025-48595 Android Framework Integer Overflow Exploited High 8.4
• CVE-2024-32896 Android Pixel Privilege Escalation Exploited High 8.1

All Google Android vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-h6p8-6hpv-2cmx.