CVE-2022-49976

platform/x86: x86-android-tablets: Fix broken touchscreen on Chuwi Hi8 with Windows BIOS

published June 18, 2025

CVSS
—
EPSS
0%
Percentile
10.5
In the wild
Unconfirmed
What it is

In the Linux kernel, the following vulnerability has been resolved:

platform/x86: x86-android-tablets: Fix broken touchscreen on Chuwi Hi8 with Windows BIOS

The x86-android-tablets handling for the Chuwi Hi8 is only necessary with

the Android BIOS and it is causing problems with the Windows BIOS version.

Specifically when trying to register the already present touchscreen

x86_acpi_irq_helper_get() calls acpi_unregister_gsi(), this breaks

the working of the touchscreen and also leads to an oops:

[ 14.248946] ------------[ cut here ]------------

[ 14.248954] remove_proc_entry: removing non-empty directory 'irq/75', leaking at least 'MSSL0001:00'

[ 14.248983] WARNING: CPU: 3 PID: 440 at fs/proc/generic.c:718 remove_proc_entry

...

[ 14.249293] unregister_irq_proc+0xe0/0x100

[ 14.249305] free_desc+0x29/0x70

[ 14.249312] irq_free_descs+0x4b/0x80

[ 14.249320] mp_unmap_irq+0x5c/0x60

[ 14.249329] acpi_unregister_gsi_ioapic+0x2a/0x40

[ 14.249338] x86_acpi_irq_helper_get+0x4b/0x190 [x86_android_tablets]

[ 14.249355] x86_android_tablet_init+0x178/0xe34 [x86_android_tablets]

Add an init callback for the Chuwi Hi8, which detects when the Windows BIOS

is in use and exits with -ENODEV in that case, fixing this.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00209 · 10.5th percentile
Published
2025-06-18T11:00Z
EPSS history
Timeline
  • 18 JUN 11:00Z
    platform/x86: x86-android-tablets: Fix broken touchscreen on Chuwi Hi8 with Windows BIOS
    cvelistv5