CVE-2026-67298

Summary: CVE-2026-67298 affects FreeRDP prior to 3.29.0. The server-side RAIL channel handler (rail_server_handle_messages in channels/rail/server/rail_main.c) is vulnerable. When processing a RAIL PDU header, the code subtracts RAIL_PDU_HEADER_LENGTH from the peer-controlled orderLength without ...

CVE-2026-67295

CVE-2026-67295 affects FreeRDP prior to 3.29.0. The issue is that server-supplied RDPDR drive redirection paths are not properly validated, allowing a malicious RDP server to traverse to prefix-sibling directories outside the configured shared root. This can enable reading, writing, deleting, and...

CVE-2026-67288

Vulnerability summary: CVE-2026-67288 affects FreeRDP before 3.29.0. A null pointer dereference occurs in smartcard cache request decoders that accept NULL NDR pointers for LookupName in SCARD_IOCTL_READCACHEA and SCARD_IOCTL_WRITECACHEA. When smartcard emulation is enabled, an attacker can send ...

CVE-2026-67288

FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard cache request decoders that accept NULL NDR pointers for LookupName in SCARDIOCTLREADCACHEA and SCARDIOCTLWRITECACHEA operations. When smartcard emulation is enabled, attackers can send crafted smartcard cache...

CVE-2026-67298

FreeRDP versions 3.28.0 and earlier contain a heap buffer overflow in the server-side RAIL channel handler railserverhandlemessages in channels/rail/server/railmain.c. When processing a RAIL PDU header, the code subtracts RAILPDUHEADERLENGTH from the peer-controlled orderLength field without firs...

CVE-2026-67292 FreeRDP before 3.29.0 WebSocket Ping Buffer Over-disclosure

FreeRDP before 3.29.0 contains a buffer over-disclosure vulnerability in the gateway WebSocket transport libfreerdp/core/gateway/websocket.c. The client's Pong reply reuses a fixed 1024-byte response stream whose length is not sealed to the actual received Ping payload, so a malicious...

CVE-2026-66401 FreeRDP before 3.29.0 Out-of-Bounds Read via UVC H.264

FreeRDP before 3.29.0 contains an out-of-bounds heap read vulnerability in the UVC H.264 extension-unit parser that fails to validate descriptor length before accessing the GUID field. A local attacker with a malicious USB video camera can trigger a heap read beyond allocated bounds during camera...

CVE-2026-67298 FreeRDP 3.28.0 Heap Buffer Overflow via RAIL orderLength Underflow

FreeRDP versions 3.28.0 and earlier contain a heap buffer overflow in the server-side RAIL channel handler railserverhandlemessages in channels/rail/server/railmain.c. When processing a RAIL PDU header, the code subtracts RAILPDUHEADERLENGTH from the peer-controlled orderLength field without firs...

CVE-2026-67306 FreeRDP before 3.29.0 Out-of-Bounds Read via Planar RLE

FreeRDP versions 3.28.0 and earlier contain an out-of-bounds read vulnerability in the RDP6 planar RLE bitmap decoder functions planardecompressplanerle and planardecompressplanerleonly in libfreerdp/codec/planar.c. Only the 1-byte control byte is bounds-checked; the subsequent 0–15...

CVE-2026-67303 FreeRDP before 3.29.0 Denial of Service via serial DeviceControl

FreeRDP before 3.29.0 contains a reachable assertion WINPRASSERTOutputBufferLength == BytesReturned in serialprocessirpdevicecontrol in channels/serial/client/serialmain.c. When serial device redirection is enabled and a server-controlled IRPMJDEVICECONTROL request specifies an unsupported IOCTL...

CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

CVE-2026-66402

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

CVE-2026-67289 FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection

FreeRDP before 3.29.0 affected versions = 3.28.0 does not validate CRLF and control characters in the server-controlled RDP redirection TargetNetAddress field. This value is copied into the client's ServerHostname and, when the client connects through an HTTP proxy, is written directly into the...

CVE-2026-67294

FreeRDP before 3.29.0 improperly validates the Extended Key Usage EKU purpose of the peer certificate during client-side server TLS authentication. In x509utilsverify, when server-purpose X509PURPOSESSLSERVER verification fails, the code falls back to client-purpose and any-purpose verification, ...

EUVD-2026-51842

FreeRDP before 3.29.0 improperly validates the Extended Key Usage EKU purpose of the peer certificate during client-side server TLS authentication. In x509utilsverify, when server-purpose X509PURPOSESSLSERVER verification fails, the code falls back to client-purpose and any-purpose verification, ...

CVE-2026-67304 FreeRDP before 3.29.0 NULL Dereference via smartcard cleanup

FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard device control request cleanup when reader-state decoding fails. Attackers can send malformed smartcard IRP requests with non-zero cReaders and truncated reader-state data to crash the process via null pointer...

CVE-2026-67304

FreeRDP had a null pointer dereference vulnerability in the smartcard device control request cleanup when reader-state decoding fails (affects FreeRDP prior to 3.29.0). An attacker can send malformed smartcard IRP requests with non-zero cReaders and truncated reader-state data to crash the proces...

CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

EUVD-2026-51844

FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory...

CVE-2026-67294

FreeRDP prior to 3.29.0 is affected by an EKU bypass in TLS server verification. In x509_utils_verify(), when server-purpose (X509_PURPOSE_SSL_SERVER) validation fails, the code may fall back to client-purpose and any-purpose checks, allowing a certificate valid only for clientAuth to be treated ...