CVE-2022-49976

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.

Reserved 2025-06-18 | Published 2025-06-18 | Updated 2025-06-18 | Assigner Linux

Product status

Default status
unaffected

84c2dcdd475f3f5d1d30c87404cafba4dd4b75ec before c77b724cddfb8ac1291a60e3e68937e62cbfc5e0
affected

84c2dcdd475f3f5d1d30c87404cafba4dd4b75ec before 2986c51540ed50ac654ffb5a772e546c02628c91
affected

Default status
affected

5.17
affected

Any version before 5.17
unaffected

5.19.8
unaffected

6.0
unaffected

References

git.kernel.org/...c/c77b724cddfb8ac1291a60e3e68937e62cbfc5e0

git.kernel.org/...c/2986c51540ed50ac654ffb5a772e546c02628c91

cve.org (CVE-2022-49976)

nvd.nist.gov (CVE-2022-49976)

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