While trying to run zabbix_agentd from the precompiled binary for 5.2.5 I encounter the following error:

[test@test-vm]$ ./zabbix_agentd -c zabbix_agentd.conf 
FATAL: kernel too old
Segmentation fault

As you can see the kernel version of the system is 2.6.9-42 which should be compatible.

[test@test-vm]$ cat /proc/version 
Linux version 2.6.9-42.ELsmp ([email protected]) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-2)) #1 SMP Wed Jul 12 23:32:02 EDT 2006

I also tried this with the latest binaries for version 4.0 and 5.0 whit the same results.

I suspect that the issue may be related to how the kernel version is parsed, maybe the middle dash breaks it.

The binaries where downloaded from here https://cdn.zabbix.com/zabbix/binaries/stable/5.2/5.2.5/zabbix_agent-5.2.5-linux-2.6-amd64-static.tar.gz