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cve-2021-22555 mitigation suggestions

Hi heroes,

We have mcafee TIE/MAR/DXL servers running and looks like mcafee linux os is base on centos, does mcafee vulnerable to this bug? to me it looks yes, the kernel versio mcafee appliances running are  >= 2.6.19

If yes, i saw redhat's kb article says that - 

ref  -


The mitigation for the Red Hat Enterprise Linux 8 is to disable for unprivileged user possibilities of running unshare(CLONE_NEWUSER) or unshare(CLONE_NEWNET) that could be done with the next command:
echo 0 > /proc/sys/user/max_user_namespaces

For making this change in configuration permanent.
Note: User namespaces are used primarily for Linux containers. If containers are in use, this requirement is not applicable.
Configure RHEL 8 to disable the use of user namespaces by adding the following line to a file in the "/etc/sysctl.d/" directory:

user.max_user_namespaces = 0

The system configuration files need to be reloaded for the changes to take effect. To reload the contents of the files, run the following command:

$ sudo sysctl --system


Does this apply to mcafee appliances as well?

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