CVE-2026-31503

CVE-2026-31503 concerns a Linux kernel UDP hash2-based wildcard-bind conflict check that can miss an in-use port when many sockets bind to the same port. The issue arises because UDP uses two hashes (hash and hash2) for collision detection and switches to hash2 only when hslot->count > 10, ...

Linux Distros Unpatched Vulnerability : CVE-2026-31503

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - udp: Fix wildcard bind conflict check when using hash2 When binding a udpsock to a local address and port, UDP uses two hashes udptable-hash and udptable-hash2...