Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.
https://www.oracle.com/security-alerts/cpuoct2020.html
https://www.oracle.com/security-alerts/cpujan2021.html
https://www.debian.org/security/2020/dsa-4757
https://usn.ubuntu.com/4458-1/
https://security.netapp.com/advisory/ntap-20200814-0005/
https://security.gentoo.org/glsa/202008-04
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-9490
http://packetstormsecurity.com/files/160392/Apache-2.4.43-mod_http2-Memory-Corruption.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00081.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00071.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00068.html