The sndmsndmidiinputread function in sound/isa/msnd/msndmidi.c in the Linux kernel through 4.11.7 allows local users to cause a denial of service (over-boundary access) or possibly have unspecified other impact by changing the value of a message queue head pointer between two kernel reads of that value, aka a "double fetch" vulnerability.
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-9985.json"
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