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Fedora 43 Coturn Important Memory Leak and Injection Fix 2026-f0fbd93125

Coturn 4.11.0 Fix prometheus response memory leak introduced in 4.10.0 Use constant-time compare for STUN MESSAGE-INTEGRITY HMAC Fix format-string injection in Redis DB driver Abort on malformed allowed/denied-peer-ip at startup. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2026-f0fbd93125 2026-05-18 00:58:32.597402+00:00 -------------------------------------------------------------------------------- Name : coturn Product : Fedora 43 Version : 4.11.0 Release : 1.fc43 URL : https://github.com/coturn/coturn/ Summary : TURN/STUN & ICE Server Description : The Coturn TURN Server is a VoIP media traffic NAT traversal server and gateway. It can be used as a general-purpose network traffic TURN server/gateway, too. This implementation also includes some extra features. Supported RFCs: TURN specs: - RFC 5766 - base TURN specs - RFC 6062 - TCP relaying TURN extension - RFC 6156 - IPv6 extension for TURN - Experimental DTLS support as client protocol. STUN specs: - RFC 3489 - "classic" STUN - RFC 5389 - base "new" STUN specs - RFC 5769 - test vectors for STUN protocol testing - RFC 5780 - NAT behavior discovery support The implementation fully supports the following client-to-TURN-server protocols: - UDP (per RFC 5766) - TCP (per RFC 5766 and RFC 6062) - TLS (per RFC 5766 and RFC 6062); TLS1.0/TLS1.1/TLS1.2 - DTLS (experimental non-standard feature) Supported relay protocols: - UDP (per RFC 5766) - TCP (per RFC 6062) Supported user databases (for user repository, with passwords or keys, if authentication is required): - SQLite - MySQL - PostgreSQL - Redis Redis can also be used for status and statistics storage and notification. Supported TURN authentication mechanisms: - long-term - TURN REST API (a modification of the long-term mechanism, for time-limited secret-based authentication, for WebRTC applications) The load balancing can be implemented withthe following tools (either one or a combination of them): - network load-balancer server - DNS-based load balancing - built-in ALTERNATE-SERVER mechanism. -------------------------------------------------------------------------------- Update Information: Coturn 4.11.0 Fix prometheus response memory leak introduced in 4.10.0 Use constant-time compare for STUN MESSAGE-INTEGRITY HMAC Fix format-string injection in Redis DB driver Abort on malformed allowed/denied-peer-ip at startup Pin session origin only after MESSAGE-INTEGRITY validates Fix build failure: define _GNU_SOURCE for recvmmsg() on Linux Drop udp_relay_servers_number config and clean up dead UDP id-space Add Unity-based unit test scaffolding Delete log line per relay thread on start Out of bound HTTP detection in parser Extend STUN client fuzz builder coverage Extend fuzzing coverage and enable local fuzzing in a container Cover all public stun_buffer.c wrappers in FuzzStunClient HTTP parsing fixes Unblock fuzz coverage for is_http and rare STUN attributes Seed address-mapping table in fuzz initializer Add deterministic challenge-response builder to FuzzStun Add fuzz coverage for integrity helpers Hoist turn_server_get_engine() out of per-packet hot path Inline addr_cpy() in the header Trim two redundant checks from per-packet relay hot path Inline get_ioa_addr_len() in the header Cache hot lookups in TURN data-path handlers Load generator mode in turnutils_uclient Filc harness and pointer typedefs -------------------------------------------------------------------------------- ChangeLog: * Sat May 9 2026 Robert Scheck - 4.11.0-1 - Upgrade to 4.11.0 (#2466643) -------------------------------------------------------------------------------- References: [ 1 ] Bug #2466643 - coturn-4.11.0 is available https://bugzilla.redhat.com/show_bug.cgi?id=2466643 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program.Use su -c 'dnf upgrade --advisory FEDORA-2026-f0fbd93125' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/keys -------------------------------------------------------------------------------- -- _______________________________________________ package-announce mailing list -- This email address is being protected from spambots. You need JavaScript enabled to view it. To unsubscribe send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/This email address is being protected from spambots. You need JavaScript enabled to view it. Do not reply to spam, report it: https://forge.fedoraproject.org/infra/tickets/issues/new . Fixes for memory leak and format string injection in Coturn 4.11.0 on Fedora 43. Upgrade advised for security.. Coturn update, Fedora security, memory leak, format string bug, STUN server fix. . Severity: Important. LinuxSecurity.com Team

May 18, 2026 •Important Fedora