{"id":"CVE-2026-63117","summary":"FreeRDP: Denial of service through ADPCM frame size calculation","details":"FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, an authenticated RDP client can advertise DVI ADPCM with nBlockAlign equal to 8 and nChannels equal to 2 to make the `bs` calculation in rdpsnd_server_select_format in channels/rdpsnd/server/rdpsnd_main.c equal zero. The subsequent out_frames modulo `bs` operation raises SIGFPE and terminates the server-side rdpsnd channel process. This vulnerability fixed in 3.28.0.","aliases":["GHSA-v64m-xxfw-hrv6"],"modified":"2026-09-11T08:36:38.707954Z","published":"2026-08-19T17:55:39.015Z","related":["openSUSE-SU-2026:11385-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-369"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63117.json"},"references":[{"type":"WEB","url":"https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63117.json"},{"type":"ADVISORY","url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v64m-xxfw-hrv6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63117"},{"type":"FIX","url":"https://github.com/FreeRDP/FreeRDP/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a"},{"type":"FIX","url":"https://github.com/FreeRDP/FreeRDP/pull/12980"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/freerdp/freerdp","events":[{"introduced":"0"},{"fixed":"b78fc0b138fe8f08a8b102e193ffb32986f4449a"},{"fixed":"5370fb26fbf034ecd11d3026b6ad639b5fff493f"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.28.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["3.5.1","3.5.0","3.4.0","3.3.0","3.2.0","3.1.0","3.0.0","3.0.0-rc0","3.0.0-beta4","3.0.0-beta3","3.0.0-beta2","3.0.0-beta1","2.0.0","2.0.0-rc4","2.0.0-rc3","2.0.0-rc2","2.0.0-rc1","2.0.0-rc0","2.0.0-beta1+android11","2.0.0-beta1+android10","1.2.0-beta1+android9","1.2.0-beta1+android7","1.1.0-beta+2013071101","1.1.0-beta1+ios4","1.1.0-beta1+android5","1.1.0-beta1+android4","1.1.0-beta1+ios3","1.1.0-beta1+ios2","1.1.0-beta1+android3","1.1.0-beta1+android2","1.1.0-beta1+ios1","1.1.0-beta1","1.0.1","1.0.0","1.0-beta5","1.0-beta4","1.0-beta2","1.0-beta1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63117.json","vanir_signatures_modified":"2026-09-11T08:36:38Z","vanir_signatures":[{"deprecated":false,"digest":{"function_hash":"196370970308247970626561756370893169118","length":2151},"id":"CVE-2026-63117-35f9b656","signature_type":"Function","signature_version":"v1","source":"https://github.com/freerdp/freerdp/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a","target":{"file":"channels/rdpsnd/server/rdpsnd_main.c","function":"rdpsnd_server_select_format"}},{"digest":{"function_hash":"244337561881823530126355423847619138045","length":2064},"id":"CVE-2026-63117-b7325b75","signature_type":"Function","signature_version":"v1","source":"https://github.com/freerdp/freerdp/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a","target":{"file":"channels/rdpsnd/server/rdpsnd_main.c","function":"rdpsnd_server_recv_formats"},"deprecated":false},{"deprecated":false,"digest":{"line_hashes":["92080791832453961197867119542612984342","260702203712035439855518403350032671944","41613030282239485201489285184661794776","279122289017783586170999661712982315155","99371922184513104268630993667637473630","43172879643769176880401935954265755609","240738237806387888843715554049442874962","300359746963504385011469722398319593286","109511278063154033093040877910952183449","6145773417871659421283411281988350579","34767696132120802475449418146477378617","272872259112074431086899800750361894738","250462095501048410321726861742489415148","335406945537100510402440484650816779010","276944286145009017626522834930226243097","40267708635510528343403960894559935781","39462709011804418773812445268289200495","272872259112074431086899800750361894738","334140187591705128187523853822308825375","232017792627593060398550897781914560533","273044645211350846033584871890401335473"],"threshold":0.9},"id":"CVE-2026-63117-ce3f7d1f","signature_type":"Line","signature_version":"v1","source":"https://github.com/freerdp/freerdp/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a","target":{"file":"channels/rdpsnd/server/rdpsnd_main.c"}}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}