CVE-2026-73215 The coturn server can end in a state where it does not accept more requests with "even-port" enabled.

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnportsallocateeven in src/apps/relay/turnports.c marks the unused odd sibling port as TPSTAKENODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it, allowin...

CVE-2026-73215

CVE-2026-73215 affects Coturn (TURN/STUN server). Before 4.17.0, in turn_ports.c, turnports_allocate_even() marks an unused odd port as TPS_TAKEN_ODD for an EVEN-PORT Allocate with R=0, even though no RTCP socket will release it. An authenticated client can permanently exhaust the relay port pool...

PT-2026-70830

Name of the Vulnerable Software and Affected Versions Coturn versions prior to 4.17.0 Description The turnports allocate even function in src/apps/relay/turn ports.c incorrectly marks the unused odd sibling port as TPS TAKEN ODD during an EVEN-PORT Allocate request when the reservation bit R is s...