{"id":"CVE-2026-91946","summary":"FreeRDP before 3.31.0 Information Disclosure via RDPGFX ResetGraphics","details":"FreeRDP versions before 3.31.0 contain an information disclosure vulnerability in the RDPGFX server's ResetGraphics PDU serializer that fails to initialize padding bytes in the fixed 340-byte wire format. Attackers can receive uninitialized heap memory including live pointers and GLib function addresses transmitted in the PDU, defeating heap ASLR and disclosing the GLib module base address.","aliases":["GHSA-r7jx-j9h7-j4xj"],"modified":"2026-10-06T08:31:44.314031826Z","published":"2026-09-15T15:18:05.104Z","database_specific":{"cwe_ids":["CWE-908"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91946.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91946.json"},{"type":"ADVISORY","url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-r7jx-j9h7-j4xj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91946"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/freerdp-before-3.31.0-information-disclosure-via-rdpgfx-resetgraphics"},{"type":"FIX","url":"https://github.com/FreeRDP/FreeRDP/commit/483c9388119f06bac420d92053cff9ef94e83bea"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/freerdp/freerdp","events":[{"introduced":"5ab2bed8749747b8e4b2ed431fd102bc726be684"},{"fixed":"aa8650b300aa4cabd85d9c72b431301509b9043f"},{"fixed":"483c9388119f06bac420d92053cff9ef94e83bea"}],"database_specific":{"cpe":"cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.0.0"},{"fixed":"3.31.0"}],"source":["CPE_RANGE","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"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-91946.json","vanir_signatures":[{"signature_version":"v1","source":"https://github.com/freerdp/freerdp/commit/483c9388119f06bac420d92053cff9ef94e83bea","target":{"file":"winpr/libwinpr/utils/stream.c","function":"Stream_New"},"deprecated":false,"digest":{"function_hash":"231867432041682170192096907494199930447","length":538},"id":"CVE-2026-91946-40e2ddd5","signature_type":"Function"},{"signature_type":"Line","signature_version":"v1","source":"https://github.com/freerdp/freerdp/commit/483c9388119f06bac420d92053cff9ef94e83bea","target":{"file":"winpr/libwinpr/utils/stream.c"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["66526936321550674325845669864391672062","149106399525389394430996085745748489367","59677448220993466901669150830539309647","205118646075812973770254754242893582082"]},"id":"CVE-2026-91946-af7be01d"}],"vanir_signatures_modified":"2026-10-06T08:31:44Z"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}