A double-free can happen in idrremoveall() in lib/idr.c in the Linux kernel 2.6 branch. An unprivileged local attacker can use this flaw for a privilege escalation or for a system crash and a denial of service (DoS).
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"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-3896.json"