CVE-2026-80596 Input: ims-pcu - only expose sysfs attributes on control interface
Accessing sysfs attributes on the wrong USB interface in the ims-pcu driver can cause unexpected behavior or crashes, leading to denial of service.
- 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-2026-80596?
CVE-2026-80596 is a high-severity denial of service vulnerability in Linux, published on 28 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:
Input: ims-pcu - only expose sysfs attributes on control interface
When the driver was converted to use the driver core to instantiate device attributes (via .dev_groups in the usb_driver structure), the attributes started appearing on all interfaces bound to the driver. Since the ims-pcu driver manually claims the secondary data interface during probe, the driver core automatically creates the sysfs attributes for that interface as well.
However, the driver only supports these attributes on the primary control interface. Data interfaces lack the necessary descriptors and internal state to handle these requests, and accessing them can lead to unexpected behavior or crashes.
Fix this by updating the is_visible() callbacks for both the main and OFN attribute groups to verify that the interface being accessed is indeed the control interface.
Which versions are affected by CVE-2026-80596?
How do I fix CVE-2026-80596?
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-2026-80596 being exploited?
There is no known exploitation of CVE-2026-80596 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80596, DEBIAN-CVE-2026-80596, GHSA-9f8c-25qh-cpfj, UBUNTU-CVE-2026-80596.