Provide references for CVE-2021-23840.
Where can I find more information about CVE-2021-23840?
References are available at: https://www.openssl.org/news/secadv/20210216.txt, https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=6a51b9e1d0cf0bf8515f7201b68fb0a3482b3dc1, https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=9b1129239f3ebb1d1c98ce9ed41d5c9476c47cb2, https://www.debian.org/security/2021/dsa-4855, https://security.gentoo.org/glsa/202103-03, https://www.oracle.com/security-alerts/cpuApr2021.html, https://www.tenable.com/security/tns-2021-10, https://www.tenable.com/security/tns-2021-09, https://security.netapp.com/advisory/ntap-20210219-0009/, https://www.tenable.com/security/tns-2021-03, https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E, https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E, https://www.oracle.com//security-alerts/cpujul2021.html, https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846, https://www.oracle.com/security-alerts/cpuoct2021.html, https://kc.mcafee.com/corporate/index?page=content&id=SB10366, https://www.oracle.com/security-alerts/cpujan2022.html, https://www.oracle.com/security-alerts/cpuapr2022.html, https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf, https://security.netapp.com/advisory/ntap-20240621-0006/.