CVE-2026-89620

A flaw was found in the Linux kernel's HID Intel QuickSPI driver. A local attacker can exploit a heap buffer overflow by providing a specially crafted report through a hidraw SET_REPORT/SET_FEATURE ioctl. This allows the attacker to overflow a buffer with controlled length and content, potentially leading to memory corruption or denial of service.

This vulnerability is rated as Important because a local user with access to an exposed hidraw device can trigger an unbounded heap buffer overflow, risking kernel compromise or denial of service. Exploitation is limited to environments equipped with Intel Touch Host Controller hardware utilizing the QuickSPI protocol, which is uncommon on enterprise server deployments and predominantly found on touch-enabled client hardware. Furthermore, interacting with the affected driver requires write permissions to the corresponding hidraw device node, which is restricted to privileged users by default.

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.

Prevent the kernel module from loading by adding an install rule to the modprobe configuration:

echo "install intel-quickspi /bin/true" > /etc/modprobe.d/disable-intel-quickspi.conf

If the module is already loaded into running memory, unload it:

modprobe -r intel-quickspi

Caveats: Disabling this module prevents the system from interfacing with Intel Touch Host Controller QuickSPI devices. If the driver is currently in use and cannot be immediately unloaded, a system restart is required for the change to take effect.