{"id":"CVE-2026-27015","summary":"FreeRDP: Smartcard NDR Alignment Padding Triggers Reachable WINPR_ASSERT Abort (Client DoS)","details":"FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()` (`libfreerdp/utils/smartcard_pack.c:1703`) allows a malicious RDP server to crash the FreeRDP client via a reachable `WINPR_ASSERT` → `abort()`. The crash occurs in upstream builds where `WITH_VERBOSE_WINPR_ASSERT=ON` (default in FreeRDP 3.22.0 / current WinPR CMake defaults). Smartcard redirection must be explicitly enabled by the user (e.g., `xfreerdp /smartcard`; `/smartcard-logon` implies `/smartcard`). Version 3.23.0 fixes the issue.","aliases":["GHSA-7g72-39pq-4725"],"modified":"2026-04-02T13:19:45.834939Z","published":"2026-02-25T20:44:14.152Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27015.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-617"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27015.json"},{"type":"ADVISORY","url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7g72-39pq-4725"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27015"},{"type":"FIX","url":"https://github.com/FreeRDP/FreeRDP/commit/65d59d3b3c2f630f2ea862687ecf5f95f8115244"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/freerdp/freerdp","events":[{"introduced":"0"},{"fixed":"b933ae18d9ad2a1d73c610868fcc30eb61654070"}]}],"versions":["1.0-beta1","1.0-beta2","1.0-beta3","1.0-beta4","1.0-beta5","1.0.0","1.0.1","1.0.2","1.0.2-rc1","1.0.2-rc2","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","2.1.0","2.1.1","2.1.2","2.10.0","2.11.0","2.11.1","2.11.2","2.11.3","2.11.4","2.11.5","2.11.6","2.11.7","2.11.8","2.2.0","2.3.0","2.3.1","2.3.2","2.4.1","2.5.0","2.6.0","2.6.1","2.7.0","2.8.0","2.8.1","2.9.0","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","3.10.0","3.10.1","3.10.2","3.10.3","3.11.0","3.11.1","3.12.0","3.13.0","3.14.0","3.14.1","3.15.0","3.16.0","3.17.0","3.17.1","3.17.2","3.18.0","3.19.0","3.19.1","3.2.0","3.20.0","3.20.1","3.20.2","3.21.0","3.22.0","3.3.0","3.4.0","3.5.0","3.5.1","3.6.0","3.6.1","3.6.2","3.6.3","3.7.0","3.9.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27015.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P"}]}