Provide references for CVE-2021-21409.
Where can I find more information about CVE-2021-21409?
References are available at: https://github.com/netty/netty/security/advisories/GHSA-f256-j965-7f32, https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj, https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21295, https://github.com/netty/netty/commit/b0fa4d5aab4215f3c22ce6123dd8dd5f38dc0432, https://www.debian.org/security/2021/dsa-4885, https://lists.apache.org/thread.html/r70c3a7bfa904f06a1902f4df20ee26e4f09a46b8fd3eb304dc57a2de%40%3Cdev.zookeeper.apache.org%3E, https://lists.apache.org/thread.html/ra66e93703e3f4bd31bdfd0b6fb0c32ae96b528259bb1aa2b6d38e401%40%3Cissues.zookeeper.apache.org%3E, https://lists.apache.org/thread.html/r2732aa3884cacfecac4c54cfaa77c279ba815cad44b464a567216f83%40%3Cissues.zookeeper.apache.org%3E, https://lists.apache.org/thread.html/r0ca82fec33334e571fe5b388272260778883e307e15415d7b1443de2%40%3Cissues.zookeeper.apache.org%3E, 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