Published: 31 December 2021
Symlink race error can allow metadata read and modify outside of the exported share.
This issue can be mitigated by disabling SMB1, which is the default configuration in Samba 4.11 and above. In environments where SMB1 cannot be disabled, symlink support can be disabled with unix extensions = no.
per upstream, fixing this required a whole rewrite of the VFS layer and there is no reasonable way to fix this in older versions. Marking this CVE as ignored for older releases.