Heads up networked Time Machine users
If you're backing up your macOS machine to a Linux shared drive via Time Machine, you're probably using this module. I know I am!
An vulnerability in Samba 4 allowed remote code to run as root due to a bug in its support for Mac clients. It's fixed in 4.13.17, 4.14.12 and 4.15.5, and in case you can't upgrade, there are patches. The vuln is being tracked as CVE-2021-44142 and received a CVSS rating of 9.9. Samba is a FOSS implementation of Microsoft's …
It was super unreliable for me as well when I was trying to back up my M1 MBP to the same Time Machine network share that my Intel Mac mini was already backing up to. What seems to have successfully worked around this issue was me creating a separate Time Machine share on my Synology NAS, dedicated to my M1 MBP's exclusive use.
As far as I know that name was abandoned long ago - and now Microsoft refers to is as SMB everywhere. There was an attempt in a couple of RFCs - but they didn't went far.
Still, Samba shows how much it is needed in *nix land too. Just look at the slow uptake of NFSv4 - because some didn't like it (the usual "religion wars" in Nixland..., just like systemd), and still slowly it had to add missing features in .x versions.