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CVE-2022-49976

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

MEDIUM
5.5
CVSS Score
Published: June 18, 2025 at 11:00 AM UTC
Updated: June 17, 2026 at 05:19 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.17 ≤ v < 5.19.85.17 ≤ v < 6.05.17.1 ≤ v < 5.19.85.175.17 rc35.17 rc45.17 rc55.17 rc65.17 rc75.17 rc86.0 rc16.0 rc26.0 rc384c2dcdd475f3f5d1d30c87404cafba4dd4b75ec
Vendor states this is fixed in 2986c51540ed50ac654ffb5a772e546c02628c91 (fixed)
Vendor states this is fixed in c77b724cddfb8ac1291a60e3e68937e62cbfc5e0 (fixed)
Vendor states this is fixed in 5.17 (unaffected)
Vendor states this is fixed in 5.19.8 (unaffected)
Vendor states this is fixed in 6.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/2986c51540ed50ac654ffb5a772e546c02628c91
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c77b724cddfb8ac1291a60e3e68937e62cbfc5e0

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
NVD-CWE-noinfo

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