The deprecated compatibility function clnt_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its hostname argument on the stack without validating its length, which may result in a buffer overflow, potentially resulting in a denial of service or (if an application is not built with a stack protector enabled) arbitrary code execution.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-23219
• https://sourceware.org/bugzilla/show_bug.cgi?id=22542
• https://www.oracle.com/security-alerts/cpujul2022.html
• https://security.gentoo.org/glsa/202208-24
• https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html