CVE-2026-64228
kernel: net: ethtool: phy: avoid NULL deref when PHY driver is unbound
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 24, 2026
Updated · October 30, 2026
Description
A flaw was found in the Linux kernel's ethtool PHY (Physical Layer) driver. A local attacker can trigger a null pointer dereference by unbinding a PHY driver via sysfs while the device is still attached. This can lead to a kernel crash, resulting in a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference