An integer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a very long message, leading to an incorrect calculation of the buffer size to store the message, resulting in undefined behavior. This issue affects glibc 2.37 and newer.
https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt
https://security.gentoo.org/glsa/202402-01