In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24394
Reference (s):
- https://security.netapp.com/advisory/ntap-20200904-0003/
- URL: https://security.netapp.com/advisory/ntap-20200904-0003/
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962254
- URL: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962254
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.8