Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
http://httpd.apache.org/security/vulnerabilities_24.html
https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf
https://kc.mcafee.com/corporate/index?page=content&id=SB10379
https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html
https://security.gentoo.org/glsa/202208-20
https://security.netapp.com/advisory/ntap-20211008-0004/
https://www.debian.org/security/2021/dsa-4982
https://www.oracle.com/security-alerts/cpuapr2022.html