The cp_report_fixup function in drivers/hid/hid-cypress.c in the Linux kernel 4.x before 4.9.4 allows physically proximate attackers to cause a denial of service (integer underflow) or possibly have unspecified other impact via a crafted HID report. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-7273
