CVE-2026-64603
Received Received - Intake

Race Condition in Linux Kernel intel-hid Driver

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: platform/x86: intel-hid: Protect ACPI notify handler against recursion Since commit e2ffcda16290 ("ACPI: OSL: Allow Notify () handlers to run on all CPUs") ACPI notify handlers like the intel-hid notify_handler() may run on multiple CPU cores racing with themselves. On convertibles and detachables (matched by DMI chassis-type 31 and 32 in dmi_auto_add_switch[]) the SW_TABLET_MODE input device is registered lazily from notify_handler() on the first tablet-mode event, via intel_hid_switches_setup(). When two such events race on different CPUs both can pass the !priv->switches check and register the priv->switches input device twice, resulting in a duplicate sysfs entry and a subsequent NULL pointer dereference. This is the same class of bug fixed by commit e075c3b13a0a ("platform/x86: intel-vbtn: Protect ACPI notify handler against recursion") for the sibling intel-vbtn driver. Protect intel-hid notify_handler() from racing with itself with a mutex to fix this.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-64603
EUVD
EUVD-2026-53789

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
intel intel_hid *
intel intel_vbtn *
linux_kernel linux_kernel *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability in the Linux kernel involves a race condition in the intel-hid ACPI notify handler. When two tablet-mode events occur simultaneously on different CPU cores, they can both register the same input device twice, causing a duplicate sysfs entry and a NULL pointer dereference.

Detection Guidance

This vulnerability is specific to the Linux kernel's intel-hid driver and may not have direct network detection methods. Check kernel logs for ACPI-related errors or NULL pointer dereferences using commands like 'dmesg | grep -i acpi' or 'journalctl -k | grep -i acpi'. Look for duplicate sysfs entries under /sys/devices/platform/intel-hid.

Impact Analysis

This could lead to system crashes or instability due to the NULL pointer dereference. Systems with convertible or detachable hardware using the intel-hid driver are particularly affected.

Mitigation Strategies

Update your Linux kernel to a patched version that includes the fix for this vulnerability. Monitor kernel security advisories and apply updates promptly. If immediate patching is not possible, restrict access to systems with vulnerable kernels or disable the intel-hid driver if not required.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-64603. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart