Vulnerability Description
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnports_allocate_even() in src/apps/relay/turn_ports.c marks the unused odd sibling port as TPS_TAKEN_ODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it, allowing an authenticated client to permanently exhaust the relay port pool and cause subsequent allocations to fail with STUN error 508. This issue is fixed in version 4.17.0.
Related Weaknesses (CWE)
References
- https://github.com/coturn/coturn/commit/4adbd82e78456e13109bf44deed4ec3aceb0bab2
- https://github.com/coturn/coturn/releases/tag/4.17.0
- https://github.com/coturn/coturn/security/advisories/GHSA-847g-qmc6-6m4r
FAQ
What is CVE-2026-73215?
CVE-2026-73215 is a documented vulnerability. Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnports_allocate_even() in src/apps/relay/turn_ports.c marks the unused odd sibling port as TPS_TAKEN_ODD for an...
How severe is CVE-2026-73215?
CVSS scoring is not yet available for CVE-2026-73215. Check NVD for updates.
Is there a patch for CVE-2026-73215?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.