Bug 2514259 (CVE-2026-73214) - CVE-2026-73214 coturn: coturn: Denial of Service via unverified DTLS session state
Summary: CVE-2026-73214 coturn: coturn: Denial of Service via unverified DTLS session ...
Keywords:
Status: NEW
Alias: CVE-2026-73214
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-11 18:02 UTC by OSIDB Bzimport
Modified: 2026-08-12 08:25 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-08-11 18:02:23 UTC 
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, dtls_server_input_handler() and create_new_connected_udp_socket() in src/apps/relay/dtls_listener.c retain OpenSSL dtls1_reassemble_fragment() state for a 35-byte fragmented ClientHello declaring a 650,000-byte handshake before cookie validation, allowing an unauthenticated remote sender using fresh UDP tuples to exhaust memory without TURN credentials, a completed handshake, a valid cookie, or source spoofing. This issue is fixed in version 4.16.0.
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