The version of freerdp installed on the remote host is prior to 2.11.7-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3938 advisory.

    A flaw was found in FreeRDP. This vulnerability allows a remote attacker with low privileges to disclose     sensitive information from the server or proxy process memory to a downstream client. This occurs because     certain functions responsible for writing Save Session Info Protocol Data Units (PDUs) use Stream_Seek     instead of Stream_Zero for reserved padding fields, leading to the transmission of uninitialized heap     memory that may contain cleartext credentials from previous sessions. (CVE-2026-85089)

    A flaw was found in FreeRDP. A heap out-of-bounds read vulnerability exists in the     `general_ChromaV1ToYUV444` function during AVC444 chroma plane reconstruction. A remote attacker, acting     as a malicious Remote Desktop Protocol (RDP) server, can exploit this by sending a specially crafted     `RFX_AVC444_BITMAP_STREAM` with specific frame geometry. This can lead to an out-of-bounds memory read,     potentially disclosing sensitive heap data to the client or causing a client crash, resulting in a denial     of service. (CVE-2026-85090)

    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. (CVE-2026-91946)

    FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that     dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race     AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing     freed channel objects. (CVE-2026-91947)

    FreeRDP versions before 3.31.0 contain a heap buffer overflow vulnerability in     nego_send_negotiation_request() that fails to validate the LB_LOAD_BALANCE_INFO field length before     writing to a fixed 512-byte buffer. A malicious RDP server or man-in-the-middle can send a Server     Redirection PDU with an oversized LB_LOAD_BALANCE_INFO value to overflow the buffer with attacker-     controlled content, causing denial of service or heap corruption before authentication completes.
    (CVE-2026-91953)

    FreeRDP before 3.31.0 contains an out-of-bounds read vulnerability in the URBDRC channel's     func_get_ep_desc function that indexes interface arrays by position instead of protocol field     InterfaceNumber. A malicious RDP server can send a crafted SELECT_CONFIGURATION message with permuted     InterfaceNumber values to read past allocated heap memory and crash the client. (CVE-2026-91956)

    FreeRDP before 3.31.0 contains a use-after-free vulnerability in the smartcard RDPDR device handler when     worker thread creation fails after device registration. Attackers can trigger thread creation failure     during channel setup to cause device pointer deallocation while devman retains a reference, leading to     crash or code execution. (CVE-2026-91957)

    FreeRDP versions before 3.31.0 fail to validate MonitorIds array values when parsing RDP connection files,     allowing unbounded array indexing in xf_detect_monitors. Attackers can craft a malicious RDP file with an     out-of-range selectedmonitors value to trigger out-of-bounds heap read and write operations when opened in     xfreerdp. (CVE-2026-91958)

    FreeRDP before 3.31.0 contains a buffer over-read vulnerability in the rts_read_result function within the     RPC gateway transport parser. Attackers can send a malicious BIND_ACK PDU with a truncated result entry to     trigger an out-of-bounds read causing process abort. (CVE-2026-91959)

    FreeRDP versions before 3.31.0 contain an uninitialized heap memory disclosure vulnerability in the urbdrc     USB redirection channel. A malicious RDP server can induce failing USB transfers to read uninitialized     heap memory from the client, defeating ASLR and enabling remote code execution when chained with memory     corruption vulnerabilities. (CVE-2026-91963)

    FreeRDP versions before 3.31.0 contain a heap-based buffer overflow in nego_send_negotiation_request when     processing Server Redirection PDU messages with attacker-controlled LoadBalanceInfo fields. A malicious     RDP server can trigger the overflow by sending an arbitrary-length field that gets written to a fixed     512-byte buffer without validation, causing client crashes or potential code execution when chained with     memory disclosure. (CVE-2026-91964)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Amazon Linux 2 : freerdp (ALAS-2026-3938)

high Nessus Plugin ID 351037

Version 1.3

Version 1.2

Version 1.1

Version 1.3 Nov 6, 2026, 9:10 PM Plugin metadata (Add IAVM Info) Plugin Feed: 202611062110
Version 1.2 Oct 10, 2026, 5:24 AM Plugin metadata (Add IAVM Info) Plugin Feed: 202610100524
Version 1.1 Sep 29, 2026, 4:08 PM New Plugin Feed: 202609291608