curl can be told to parse a `.netrc` file for credentials. If that file ends in a line with consecutive non-white space letters and no newline, curl could read past the end of the stack-based buffer, and if the read works, write a zero byte possibly beyond its boundary. This will in most cases cause a segfault or similar, but circumstances might also cause different outcomes. If a malicious user can provide a custom netrc file to an application or otherwise affect its contents, this flaw could be used as denial-of-service.

Reference:

https://curl.se/docs/CVE-2022-35260.html