cve 2026 5950

CVE-2026-5950 is a medium-severity vulnerability in the BIND 9 recursive resolver disclosed by ISC on May 20, 2026. The flaw can cause affected servers to enter an unbounded resend loop, draining resources under attacker-controlled query conditions. While BIND is not a Windows component, Microsoft's Security Response Center tracks the issue because BIND remains part of many Windows-adjacent enterprise DNS architectures. For administrators, the risk is not a catastrophic total outage but an operational drain that can become expensive if ignored. The tag covers discussions about patching BIND 9 recursive resolvers to prevent resource-draining loops, with emphasis on enterprise environments where Windows and BIND coexist.