Use-after-free in Linux kernel - CVE-2026-31582
Published: April 25, 2026
Vulnerability identifier: #VU127823
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31582
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in the powerz hwmon driver when handling a USB device disconnect followed by a read operation. A local user can disconnect the device and trigger a subsequent read to cause a denial of service.
The issue occurs after the freed URB pointer is dereferenced during device access after disconnection.
How to mitigate CVE-2026-31582
Install security update from vendor's repository.