CVE-2026-43251 HID: prodikeys: Check presence of pm->input_ep82
A missing null check in the Linux kernel HID prodikeys driver allows a fake USB device to cause a system crash.
- 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-2026-43251?
CVE-2026-43251 is a medium-severity vulnerability in Linux kernel, published on 6 May 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: prodikeys: Check presence of pm->input_ep82
Fake USB devices can send their own report descriptors for which the input_mapping() hook does not get called. In this case, pm->input_ep82 stays NULL, which leads to a crash later.
This does not happen with the real device, but can be provoked by imposing as one.
Weakness: CWE-476
Which versions are affected by CVE-2026-43251?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43251?
Apply the vendor's patch.
Is CVE-2026-43251 being exploited?
There is no known exploitation of CVE-2026-43251 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43251, DEBIAN-CVE-2026-43251, GHSA-27qm-738j-qww9, ROOT-OS-DEBIAN-11-CVE-2026-43251, ROOT-OS-UBUNTU-2204-CVE-2026-43251, ROOT-OS-UBUNTU-2404-CVE-2026-43251 and 1 more.