CVE-2026-68091 HID: wacom: stop hardware after post-start probe failures
A resource leak in the Linux kernel Wacom driver can cause denial of service if hardware initialization fails after startup.
- 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-2026-68091?
CVE-2026-68091 is a high-severity denial of service vulnerability in Linux, published on 10 Aug 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:
HID: wacom: stop hardware after post-start probe failures
wacom_parse_and_register() starts HID hardware before registering inputs and initializing pad LEDs/remotes. Those later steps can fail, but their error paths currently release Wacom resources without stopping the HID hardware.
Route post-hid_hw_start() failures through hid_hw_stop() before releasing driver resources.
This issue was identified during our ongoing static-analysis research while reviewing kernel code.
Weakness: CWE-404
Which versions are affected by CVE-2026-68091?
How do I fix CVE-2026-68091?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-68091 being exploited?
There is no known exploitation of CVE-2026-68091 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68091, DEBIAN-CVE-2026-68091, GHSA-jmfj-p2w9-43g4, UBUNTU-CVE-2026-68091.