CVE-2026-46073
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
A vulnerability in the Linux kernel related to the missing call to usb_kill_urb() on signal interrupt has been fixed. This bug led to reading from an invalid transfer buffer when no data was received from the device.
Risk Assessment
Organizations may be exposed to incorrect data reads, potentially leading to unexpected system behavior and data integrity issues.
Recommendation
It is recommended to update the Linux kernel to the latest version to eliminate this vulnerability and ensure proper signal interrupt handling.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: hwmon: (powerz) Fix missing usb_kill_urb() on signal interrupt wait_for_completion_interruptible_timeout() returns -ERESTARTSYS when interrupted. This needs to abort the URB and return an error. No data has been received from the device so any reads from the transfer buffer are invalid. The original code tests !ret, which only catches the timeout case (0). On signal delivery (-ERESTARTSYS), !ret is false so the function skips usb_kill_urb() and falls through to read from the unfilled transfer buffer. Fix by capturing the return value into a long (matching the function return type) and handling signal (negative) and timeout (zero) cases with separate checks that both call usb_kill_urb() before returning.