CVE-2021-4037

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A vulnerability was found in the fs/inode.c:inode init owner() function logic of the Linux kernel. This issue allows local users to create files for the XFS file-system with unintended group ownership and with group execution and SGID permission bits set. The vulnerability can be exploited in a scenario where a directory is SGID, belongs to a certain group, and is writable by a user who is not a member of this group, leading to excessive permissions being granted. The vulnerability is related to the incorrect setting of group access attributes when creating files in the XFS file system, which can allow an attacker to elevate their privileges, gain access to protected information, and cause a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.