drivers/infiniband/core/ucma.c in the Linux kernel through 4.17.11 allows ucmaleavemulticast to access a certain data structure after a cleanup step in ucmaprocessjoin, which allows attackers to cause a denial of service (use-after-free).
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-14734.json"
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