{"affected":[{"product":"freeswitch","source":"CNA: GitHub_M","vendor":"signalwire","versions":[{"status":"affected","version":"< 1.11.2"}]},{"ecosystem":"c","packageName":"FreeSWITCH","product":"FreeSWITCH","source":"GitHub GHSA-mjp3-3cq2-hxj4","vendor":"","versions":[{"status":"affected","version":"<= 1.11.1","versionType":"GitHub advisory range"}]}],"cveId":"CVE-2026-116783","cwes":["CWE-129","CWE-787"],"description":"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, udptl_rx_packet() used a peer-controlled FEC entry count directly to fill five-entry FEC arrays in a mod_spandsp T.38 session. A larger count wrote sender-controlled error-recovery data beyond those arrays and persisted the oversized count for a later reconstruction pass. Any peer able to deliver UDPTL to an established T.38 fax session can reach the parser, including deployments using fax applications or a T.38 gateway. The memory corruption can crash FreeSWITCH and end every active call, although remote code execution has not been demonstrated. This issue is fixed in version 1.11.2.","epss":{"date":"2026-11-09","percentile":0.49897,"score":0.00618},"exploits":[],"kev":null,"metrics":[{"score":8.2,"severity":"high","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},{"score":8.2,"severity":"high","source":"NVD: security-advisories@github.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"}],"modifiedAt":1794266233090,"publishedAt":1793907704761,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-mjp3-3cq2-hxj4"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/signalwire/freeswitch/commit/b999d2a594f025ac0dd4d7b137635308ef298272"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/signalwire/freeswitch/releases/tag/v1.11.2"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/signalwire/freeswitch/commit/b999d2a594f025ac0dd4d7b137635308ef298272"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/signalwire/freeswitch/releases/tag/v1.11.2"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-mjp3-3cq2-hxj4"},{"source":"GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-mjp3-3cq2-hxj4"}],"remediation":[{"kind":"fix","source":"GitHub GHSA-mjp3-3cq2-hxj4","text":"FreeSWITCH (c): GitHub reports patched versions >= 1.11.2. Check the advisory for the affected release branch.","url":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-mjp3-3cq2-hxj4"}],"revision":"49d06d25f2fd51ba0921c059e495c2dd6490717461d7e3265b25ac86c1be98b6","sources":[{"modifiedAt":1794264259916,"name":"CNA: GitHub_M","retrievedAt":1794265724899,"url":"https://www.cve.org/CVERecord?id=CVE-2026-116783"},{"modifiedAt":1794266233090,"name":"NVD","retrievedAt":1794269906700,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116783"},{"modifiedAt":1793206860000,"name":"GitHub Security Advisories","retrievedAt":1794080111687,"url":"https://github.com/signalwire/freeswitch/security/advisories/GHSA-mjp3-3cq2-hxj4"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794265728414,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-116783"}],"ssvc":{"assessedAt":1794264248370,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"FreeSWITCH mod_spandsp: out-of-bounds write parsing UDPTL error-recovery data","updatedAt":1794269906700}