Cannot execute script while its permission is 'x'

I have a script in the current directory, however, given that:

1. the permission is -rwxr-xr-x
2. the script has a shebang #!/bin/bash at the top of the file
3. my shell is /bin/bash
4. I can execute it using bash script.sh

I cannot execute it using ./script.sh. It gives me:

bash: ./script.sh: Permission denied

Why is this happening and what is the solution?

Solution 1:

• The execution is not allowed because the file is on a filesystem mounted with the "noexec" option. Use findmnt -u -T . to find out if that's the case. If you have root privileges, mount -o remount,exec <dir> should remove this option.

• The execution is not allowed by MAC policies (SELinux, SMACK, possibly AppArmor). Check the system logs, starting with journalctl -n 100 and dmesg. Bypassing this (if you're the administrator) depends on which MAC system is actually in use.