CVE-2026-64603 is a vulnerability in Linux Kernel
Published on August 6, 2026
platform/x86: intel-hid: Protect ACPI notify handler against recursion
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.
Products Associated with CVE-2026-64603
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version e2ffcda1629012a2c1a3706432bc45fdc899a584 and below a6402808e552e44e9c26a9fe8395ac11703d5800 is affected.
- Version e2ffcda1629012a2c1a3706432bc45fdc899a584 and below 86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0 is affected.
- Version e2ffcda1629012a2c1a3706432bc45fdc899a584 and below eace3b3e729d5ba11794d69acfafb58a7950217c is affected.
- Version e2ffcda1629012a2c1a3706432bc45fdc899a584 and below c085d82613d5618814b84406c8b2d64f1bc305e7 is affected.
- Version 6.8 is affected.
- Before 6.8 is unaffected.
- Version 6.12.96, <= 6.12.* is unaffected.
- Version 6.18.39, <= 6.18.* is unaffected.
- Version 7.1.4, <= 7.1.* is unaffected.
- Version 7.2-rc1, <= * is unaffected.