{"id":"CVE-2026-116568","title":"FreeSWITCH: Out-of-bounds read in mod_rtmp H.264 video message parsing","summary":"FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to 1.11.2, rtmp_rtmp2rtpH264() trusted the lengt…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-125","CWE-191"],"vendor":"signalwire","product":"freeswitch","affected":["freeswitch < 1.11.2"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-11-05T21:12:02.376974Z"},"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:12:15.082Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116568","references":[{"url":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-2gp7-f34j-j4xw","label":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-2gp7-f34j-j4xw"},{"url":"https://github.com/signalwire/freeswitch/commit/72cda5bfad67d14d8dbe76b8f8bdd38c4fa5c932","label":"https://github.com/signalwire/freeswitch/commit/72cda5bfad67d14d8dbe76b8f8bdd38c4fa5c932"},{"url":"https://github.com/signalwire/freeswitch/releases/tag/v1.11.2","label":"https://github.com/signalwire/freeswitch/releases/tag/v1.11.2"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T22:38:31.997Z","slug":"CVE-2026-116568","body":"## Overview\n\nFreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to 1.11.2, rtmp_rtmp2rtpH264() trusted the length prefix of each inbound H.264 NAL unit without checking it against the bytes remaining in the RTMP message. An oversized declared unit underflowed the unsigned remaining-byte counter and advanced the parser beyond its receive buffer, where the next length-prefix read could crash the process. The flaw affects deployments that build and load mod_rtmp and accept video call sessions, commonly on TCP port 1935; placing the call requires a directory login where auth-calls is true, while no credentials are required where auth-calls is absent or false. A remote client can terminate FreeSWITCH and every active call, but the defect supplies no write primitive and memory disclosure has not been demonstrated. This issue is fixed in version 1.11.2.\n\n## Affected\n\n- `freeswitch < 1.11.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}