CVE-2026-73215

NameCVE-2026-73215
DescriptionCoturn 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1144385

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
coturn (PTS)bullseye4.5.2-3vulnerable
bookworm4.6.1-1vulnerable
trixie4.6.1-2vulnerable
forky, sid4.15.0-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
coturnsource(unstable)(unfixed)1144385

Notes

https://github.com/coturn/coturn/security/advisories/GHSA-847g-qmc6-6m4r
Fixed by: https://github.com/coturn/coturn/commit/4adbd82e78456e13109bf44deed4ec3aceb0bab2 (4.17.0)

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