In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds write when many elements are placed in a single bucket. NOTE: exploitation might be impractical without the CAPSYSADMIN capability.
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"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-38166.json"