The kernel maintainers don't flag "security fixes" as special, and they have a well-thought-out reason for that, see many other comments in this thread.
That, and they flag pretty much any random patch with a CVE these days, making it harder for distro maintainers to keep up.
For this specific "bug" they took care to not mention any security angle in the commit message, making it extremely hard for an outsider to even realize this was a critical patch. I assume this was because they wanted to push the fix without breaking embargo.
