In PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0 on Windows, PHP link() function accepts filenames with embedded \0 byte and treats them as terminating at that byte. This could lead to security vulnerabilities, e.g. in applications checking paths that the code is allowed to access.
bugs.php.net/bug.php?id=78862
lists.fedoraproject.org/archives/list/[email protected]/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
lists.fedoraproject.org/archives/list/[email protected]/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
security.netapp.com/advisory/ntap-20200103-0002/
www.tenable.com/security/tns-2021-14