{"id":"CVE-2026-23948","summary":"FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()","details":"FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.","aliases":["GHSA-6f3c-qvqq-2px5"],"modified":"2026-04-19T10:47:08.513219Z","published":"2026-02-09T18:12:00.737Z","related":["ALSA-2026:6340","ALSA-2026:6799","ALSA-2026:6918","openSUSE-SU-2026:10132-1","openSUSE-SU-2026:20339-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23948.json","cwe_ids":["CWE-476"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23948.json"},{"type":"ADVISORY","url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6f3c-qvqq-2px5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23948"},{"type":"FIX","url":"https://github.com/FreeRDP/FreeRDP/commit/4d44e3c097656a8b9ec696353647b0888ca45860"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/freerdp/freerdp","events":[{"introduced":"0"},{"fixed":"e3ef4c71138f76516299cb3637d2d0c59b2a3737"},{"fixed":"4d44e3c097656a8b9ec696353647b0888ca45860"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"3.22.0"}]}}],"versions":["1.0-beta1","1.0-beta2","1.0-beta4","1.0-beta5","1.0.0","1.0.1","1.1.0-beta+2013071101","1.1.0-beta1","1.1.0-beta1+android2","1.1.0-beta1+android3","1.1.0-beta1+android4","1.1.0-beta1+android5","1.1.0-beta1+ios1","1.1.0-beta1+ios2","1.1.0-beta1+ios3","1.1.0-beta1+ios4","1.2.0-beta1+android7","1.2.0-beta1+android9","2.0.0","2.0.0-beta1+android10","2.0.0-beta1+android11","2.0.0-rc0","2.0.0-rc1","2.0.0-rc2","2.0.0-rc3","2.0.0-rc4","3.0.0","3.0.0-beta1","3.0.0-beta2","3.0.0-beta3","3.0.0-beta4","3.0.0-rc0","3.1.0","3.2.0","3.3.0","3.4.0","3.5.0","3.5.1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23948.json","vanir_signatures":[{"signature_type":"Function","target":{"function":"rdp_send_save_session_info","file":"libfreerdp/core/info.c"},"signature_version":"v1","deprecated":false,"id":"CVE-2026-23948-491c49ff","source":"https://github.com/freerdp/freerdp/commit/4d44e3c097656a8b9ec696353647b0888ca45860","digest":{"length":824,"function_hash":"296723680882049798059941187871937152013"}},{"signature_type":"Function","target":{"function":"rdp_write_logon_info_v2","file":"libfreerdp/core/info.c"},"signature_version":"v1","deprecated":false,"id":"CVE-2026-23948-bfdbc648","source":"https://github.com/freerdp/freerdp/commit/4d44e3c097656a8b9ec696353647b0888ca45860","digest":{"length":859,"function_hash":"45724886677385241037297634780496029147"}},{"signature_type":"Line","target":{"file":"libfreerdp/core/info.c"},"signature_version":"v1","deprecated":false,"id":"CVE-2026-23948-f6add5c7","source":"https://github.com/freerdp/freerdp/commit/4d44e3c097656a8b9ec696353647b0888ca45860","digest":{"line_hashes":["303570308137007596241133626141409251069","172206055707252354396494738938528294681","177851478380184967999132012935321217321","133474851341614138189052200250901149880","149686881793546668771553315058884183438","150076584959503601564475936708831910079","194057982406646705393007491469310668470","110574586751174827215913481814788370533","81064420111355933664897814248294920029","77542545665329044225037360310978838805","58529151795256268344797828784330827848","270441581498131049657371839922562455109","27486731944105615811057150327580686535","171049451127415432941949176490140030192","183233678745431434199111828757168960887","198856791512734167340600705933671601592","124628853642793543083566204196081069369","295244551128561400658523636062862669416","20678181885798986216087982299654460067"],"threshold":0.9}}],"vanir_signatures_modified":"2026-04-19T10:47:08Z"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}]}