Linux Kernel 6.16 Patches Core Dump Vulnerabilities: Saying Goodbye to a 'Stupid' API

The Linux kernel 6.16 release significantly improves core dump handling, addressing long-standing security vulnerabilities. Previous API designs had flaws, such as core dump handlers running with root privileges, making them attractive attack targets, and race conditions leading to vulnerabilities. The new improvements introduce pidfd to ensure handlers operate on the correct crashed process and allow handlers to bind to a socket for receiving core dumps, reducing privilege escalation risks and effectively preventing attacks.