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CVE-2024-57986 is an improper input-validation vulnerability in the Linux kernel HID core, introduced in Linux kernel 5.0. The hid_apply_multiplier() logic incorrectly assumed that a HID Resolution Multiplier control would always be contained in a Logical Collection. HID specifications permit a multiplier without a Logical Collection to apply to all controls in a report. Where no Logical Collection exists in the applicable collection hierarchy, the vulnerable code did not correctly represent this condition. The fix sets the multiplier collection reference to NULL when the discovered collection is not Logical.
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Linux kernel HID core input-validation flaw.
A Linux kernel HID core flaw in Resolution Multiplier handling, where hid_apply_multiplier() incorrectly assumes a Logical Collection exists, contrary to HID specification behavior for controls with no Logical Collection.
An improper-input-validation vulnerability in the Linux kernel HID core affecting Resolution Multiplier handling. A malformed HID report descriptor without a Logical Collection can trigger the flawed assumption, with availability impact assessed as high (e.g., denial of service).
A Linux kernel HID core vulnerability in drivers/hid/hid-core.c, introduced in kernel 5.0. The hid_apply_multipler() routine incorrectly assumes a Resolution Multiplier belongs to a Logical Collection, rather than handling the valid case where none exists. The fix sets multiplier_collection to NULL when the discovered collection is not Logical.
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