CVE-2026-89982: i2c: mux: Fix channel node leak on adapter add failure
Published Sep 16, 2026
·Updated
In the Linux kernel, the following vulnerability has been resolved:
i2c: mux: Fix channel node leak on adapter add failure
i2cmuxaddadapter() takes a reference to the Device Tree channel node before registering the new adapter. If adapter registration fails, the error path frees the private data without dropping that reference.
Release the channel node before freeing the private data.
Affected Software
1 affected component
Linux Kernel
Event History
Sep 16, 2026
CVE Published
via MITRE·10:32 AM
Data Sourced
via MITRE·10:32 AM
Description
Frequently Asked Questions
1
Under what condition does the leak occur?
The leak occurs when i2c_mux_add_adapter() has taken a reference to a Device Tree channel node and registration of the new adapter then fails.
2
What resource is leaked and what does the fix change?
A reference to the Device Tree channel node is leaked on the adapter-registration failure path. The fix releases that channel-node reference before freeing the private data.