CVE-2022-49306 usb: dwc3: host: Stop setting the ACPI companion
A Linux kernel USB driver bug caused unintended resource leaks by incorrectly sharing ACPI companion pointers, requiring a patch to stop setting the companion manually.
- 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-2022-49306?
CVE-2022-49306 is a medium-severity vulnerability in Linux kernel, published on 26 Feb 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:
usb: dwc3: host: Stop setting the ACPI companion
It is no longer needed. The sysdev pointer is now used when assigning the ACPI companions to the xHCI ports and USB devices.
Assigning the ACPI companion here resulted in the fwnode->secondary pointer to be replaced also for the parent dwc3 device since the primary fwnode (the ACPI companion) was shared. That was unintentional and it created potential side effects like resource leaks.
Which versions are affected by CVE-2022-49306?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49306?
Apply the vendor's patch.
Is CVE-2022-49306 being exploited?
There is no known exploitation of CVE-2022-49306 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-68615, DEBIAN-CVE-2022-49306, GHSA-5h2r-p6h6-8p2x, ROOT-OS-DEBIAN-11-CVE-2022-49306, ROOT-OS-UBUNTU-2204-CVE-2022-49306, UBUNTU-CVE-2022-49306.