buffer sizing

Buffer sizing is a recurring theme in system-level programming and security, as demonstrated by the Linux kernel vulnerability CVE-2026-31630. This flaw in the AF_RXRPC procfs code used fixed 50-byte stack buffers for socket addresses, but an IPv6 address with port can require 51 bytes including the terminating NUL, leading to an off-by-one error. The issue highlights that even diagnostic paths rarely touched by users can harbor buffer sizing mistakes. While the NVD published the record in April 2026, a CVSS score was not immediately assigned, leaving administrators to assess urgency from kernel commits and distribution advisories. The lesson is that careful buffer sizing remains critical for security and stability.