diff --git a/usr/lib/sysctl.d/990-security-misc.conf b/usr/lib/sysctl.d/990-security-misc.conf
index f660d54c..321f3b80 100644
--- a/usr/lib/sysctl.d/990-security-misc.conf
+++ b/usr/lib/sysctl.d/990-security-misc.conf
@@ -68,6 +68,9 @@ kernel.unprivileged_bpf_disabled=1
 net.core.bpf_jit_harden=2
 
 ## Disable asynchronous I/O for all processes.
+## Valid only for linux kernel version >= 6.6.
+## Command is retained here for future-proofing and completeness.
+## https://forums.whonix.org/t/io-uring-security-vulnerabilties/16890/6
 kernel.io_uring_disabled=2
 
 #### meta start