CVE-2019-2215

CVE-2019-2215 is a use-after-free flaw (CWE-416) in the Android kernel's binder.c IPC driver that allows privilege escalation from an application to the Linux kernel. Exploitation requires no user interaction, but an attacker must either run a malicious local application or chain the bug with a vulnerability in a network-facing application. Successful exploitation yields kernel-level code execution, effectively rooting the device and giving the attacker full control over apps, data, and communications. Affected parties include Android devices with unpatched kernels (reporting at the time indicated most Android phones were affected), plus products shipping affected Android kernel code, including Google Android, Debian/Ubuntu builds, and NetApp and Huawei offerings. The flaw was publicly disclosed and patched in Android's October 2019 security updates, public proof-of-concept exploits exist, and it is listed in CISA's Known Exploited Vulnerabilities catalog with a high (72.1%) EPSS probability of exploitation; headlines confirm in-the-wild use, including a Google Play app that leveraged it to deliver spyware.

What to do: Apply vendor-supplied updates per CISA's required action — for phones and tablets, ensure the device is on the October 2019 Android security patch level or later (check Settings > About phone > Android security patch level) and patch via MDM across your fleet; NetApp, Huawei, Debian, and Ubuntu customers should install their vendors' corresponding kernel updates. Because this is a local privilege escalation with no user interaction required, also patch any network-facing applications that could be chained with it, and hunt for signs of exploitation such as unexpected root or unknown sideloaded/rooting apps on managed devices.