CVE-2022-49944 Revert "usb: typec: ucsi: add a common function ucsi_unregister_connectors()"
A regression in the Linux kernel USB Type-C UCSI driver causes a NULL pointer dereference when reading power supply sysfs entries, leading to 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-2022-49944?
CVE-2022-49944 is a high-severity vulnerability in Linux kernel, published on 18 Jun 2025. 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:
Revert "usb: typec: ucsi: add a common function ucsi_unregister_connectors()"
The recent commit 87d0e2f41b8c ("usb: typec: ucsi: add a common function ucsi_unregister_connectors()") introduced a regression that caused NULL dereference at reading the power supply sysfs. It's a stale sysfs entry that should have been removed but remains with NULL ops. The commit changed the error handling to skip the entries after a NULL con->wq, and this leaves the power device unreleased.
For addressing the regression, the straight revert is applied here. Further code improvements can be done from the scratch again.
Weakness: CWE-476
Which versions are affected by CVE-2022-49944?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49944?
Apply the vendor's patch.
Is CVE-2022-49944 being exploited?
There is no known exploitation of CVE-2022-49944 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49944, GHSA-8gj5-9g6q-pjv8, UBUNTU-CVE-2022-49944.