CVE-2026-90402 bus: mhi: host: Fix controller cleanup on EDL sysfs failure
Improper cleanup in the Linux kernel MHI host driver when sysfs creation fails, potentially leaving a registered device in an inconsistent state.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90402?
CVE-2026-90402 is a high-severity vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
bus: mhi: host: Fix controller cleanup on EDL sysfs failure
mhi_register_controller() adds the controller device before creating the optional trigger_edl sysfs file. If sysfs_create_file() fails, the error path only drops the device reference and leaves the device registered.
Hence, call device_del() in the error path before put_device().
Which versions are affected by CVE-2026-90402?
How do I fix CVE-2026-90402?
Apply the vendor's patch.
Is CVE-2026-90402 being exploited?
There is no known exploitation of CVE-2026-90402 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-90402, DEBIAN-CVE-2026-90402, GHSA-fqr5-r6rr-x7fx, UBUNTU-CVE-2026-90402.