CVE-2026-97968 hwmon: (corsair-cpro) Create debugfs entries after hwmon registration
A use-after-free in the Linux kernel corsair-cpro driver allows local attackers to crash the system or potentially execute code via debugfs files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-97968?
CVE-2026-97968 is an use after free vulnerability in Linux, published on 25 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:
hwmon: (corsair-cpro) Create debugfs entries after hwmon registration
ccp_debugfs_init() registers debugfs files whose private data is the devm allocated ccp. It runs before hwmon_device_register_with_info(), so when that registration fails, ccp_probe() returns with the files still in place. The HID core then frees ccp, and ccp_remove() is not called for a failed probe, so nothing removes them later either. Reading one of the files dereferences the freed pointer.
Create the debugfs entries only after the hwmon device has been registered, so no failing path can leave them behind.
The two version queries stay where they are. They send USB commands without holding ccp->mutex, which is only safe as long as nothing else can call send_usb_cmd(); once the hwmon device is registered its callbacks can do so concurrently. Only the debugfs creation moves, and it is told which queries succeeded.
Which versions are affected by CVE-2026-97968?
How do I fix CVE-2026-97968?
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-2026-97968 being exploited?
There is no known exploitation of CVE-2026-97968 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-97968, DEBIAN-CVE-2026-97968, GHSA-fqg8-p65w-8fh2, UBUNTU-CVE-2026-97968.