A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.
https://bugzilla.redhat.com/show_bug.cgi?id=1908845
https://lists.debian.org/debian-lts-announce/2021/02/msg00032.html
https://security.gentoo.org/glsa/202311-16