CVE-2026-93826 HID: hidpp: fix potential UAF in hidpp_connect_event()
A use-after-free vulnerability in the Linux kernel HID driver allows attackers to potentially execute code or escalate privileges when device registration fails.
- 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-2026-93826?
CVE-2026-93826 is a high-severity use after free vulnerability in Linux, published on 24 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:
HID: hidpp: fix potential UAF in hidpp_connect_event()
If input_register_device() fails, we call input_free_device(), but keep stale pointer to the old device in hidpp->input, which could potentially lead to UAF. Fix that by resetting it to NULL before returning from hidpp_connect_event().
Which versions are affected by CVE-2026-93826?
How do I fix CVE-2026-93826?
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-2026-93826 being exploited?
There is no known exploitation of CVE-2026-93826 in the wild and no public exploit code.
Sources
Also known as AZL-103721, BELL-CVE-2026-93826, DEBIAN-CVE-2026-93826, GHSA-3wpc-2mx8-q7f6, UBUNTU-CVE-2026-93826.