Need to update kernels to at least 5.4.176
https://ubuntu.com/security/CVE-2023-52340
Nysernet nodes are showing the error in dmesg:
root@nrp-c10:/home/nautilus# uname -r
5.4.0-170-generic
root@nrp-c10:/home/nautilus# dmesg | tail
[6999468.873999] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.
[6999468.874055] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.
[6999495.077665] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.
[6999496.077888] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.
[6999500.105629] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.
[6999501.129616] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.
[6999502.153614] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.
[6999505.019037] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.
[6999526.465998] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.
[6999527.466164] Route cache is full: consider increasing sysctl net.ipv[4|6].route.max_size.