NULL pointer dereference in Linux kernel - CVE-2026-31727
Published: May 2, 2026
Vulnerability identifier: #VU128963
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-2026-31727
CWE-ID: CWE-476
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 NULL pointer dereference in eth_get_drvinfo in the u_ether USB gadget component when handling ethtool queries on a surviving interface during the detached window after unbind. A local user can query the interface with ethtool to cause a denial of service.
The issue occurs after the gadget device has been detached and its gadget pointer has been cleared.
How to mitigate CVE-2026-31727
Install security update from vendor's repository.