CVE-2018-9422 Use after free in Android

What is CVE-2018-9422?

CVE-2018-9422 is a high-severity use after free vulnerability in Debian Debian Linux, published on 6 Nov 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In get_futex_key of futex.c, there is a use-after-free due to improper locking. This could lead to local escalation of privilege with no additional privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-74250718 References: Upstream kernel.

Weakness: CWE-416

Which versions are affected by CVE-2018-9422?

It affects 2 products.

Products include Debian Debian Linux, Google Android.

How do I fix CVE-2018-9422?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2018-9422 being exploited?

There is no known exploitation of CVE-2018-9422 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2018-9422, GHSA-7jfq-4vfx-p3rg, UBUNTU-CVE-2018-9422.