CVE-2022-50733 usb: idmouse: fix an uninit-value in idmouse_open
A local attacker with physical access can trigger an uninitialized memory read in the idmouse USB driver, potentially disclosing kernel memory contents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2022-50733?
CVE-2022-50733 is a vulnerability in Linux, published on 24 Dec 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In the Linux kernel, the following vulnerability has been resolved:
usb: idmouse: fix an uninit-value in idmouse_open
In idmouse_create_image, if any ftip_command fails, it will go to the reset label. However, this leads to the data in bulk_in_buffer[HEADER..IMGSIZE] uninitialized. And the check for valid image incurs an uninitialized dereference.
Fix this by moving the check before reset label since this check only be valid if the data after bulk_in_buffer[HEADER] has concrete data.
Note that this is found by KMSAN, so only kernel compilation is tested.
Which versions are affected by CVE-2022-50733?
How do I fix CVE-2022-50733?
Apply the vendor's patch.
Is CVE-2022-50733 being exploited?
There is no known exploitation of CVE-2022-50733 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50733, GHSA-3qmv-4mq3-fcr8, UBUNTU-CVE-2022-50733.