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CVE-2026-125394

FreeRDP before 3.33.0 Use-After-Free via Stale Brush Cache Pointer

FreeRDP before 3.33.0 contains a heap use-after-free vulnerability in update_gdi_patblt(), update_gdi_polygon_cb() and update_gdi_mem3blt() that retain stale brush cache pointers. A malicious RDP server can resend CACHE_BRUSH to the same slot then send PATBLT, causing clients to read freed heap memory, disclosing data or crashing.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121411

FreeRDP before 3.32.2 X11 Client Abort via RDPGFX Scaled Output Geometry

FreeRDP before 3.32.2 fails to bound server-supplied target dimensions and output origin in RDPGFX MAPSURFACETOSCALEDOUTPUT PDUs, allowing malicious RDP servers to abort X11 clients. Attackers can map a surface to oversized scaled output, triggering checked UINT16 cast or freerdp_image_scale stride assertion failures that terminate the client.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121407

FreeRDP before 3.32.2 Shadow Server Denial of Service via remdesk Channel

FreeRDP before 3.32.2 contains a denial of service vulnerability in the shadow server's remdesk_server_thread that allows authenticated clients to crash the process via an inverted PDU length check. Attackers can send an 8192-byte remdesk payload declaring an eight-byte PDU length to trigger a fatal Stream_Seek assertion, aborting the server and dropping sessions.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121403

FreeRDP before 3.32.2 Denial of Service via Malformed Drive IRP

FreeRDP before 3.32.2 contains a denial of service vulnerability where a malformed drive DEVICE_IOREQUEST with a truncated IRP_MJ_CREATE body silently kills the drive worker. A malicious RDP server can send such an IRP then post further requests that accumulate unbounded in the IrpQueue, exhausting memory and causing session availability loss.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121399

FreeRDP before 3.32.2 Memory Exhaustion via RD Gateway Packet Length

FreeRDP before 3.32.2 contains a memory allocation vulnerability in rdg_receive_packet that allows a malicious RD Gateway to force a 2 GiB client allocation before tunnel authentication. Attackers can send an eight-byte RDG header declaring packet length 0x7FFFFFFF to trigger pre-authentication memory exhaustion and denial of service.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121395

FreeRDP 3.17.0 before 3.32.2 Denial of Service via RemoteFX Decoder

FreeRDP from 3.17.0 before 3.32.2 contains an assertion failure in the RemoteFX differential decoder when verbose WinPR assertions are enabled. A malicious RDP server can send a crafted RemoteFX tile with adjacent LL3 coefficients summing beyond signed 16-bit range to abort the client process.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121391

FreeRDP before 3.32.2 File Descriptor Exhaustion via Parallel CREATE

FreeRDP from 3.0.0 before 3.32.2 contains a file descriptor leak in parallel_process_irp_create that fails to close previous descriptors on repeated IRP_MJ_CREATE requests. A hostile RDP server with parallel-device redirection enabled can send repeated CREATE requests to exhaust the client descriptor table and crash the process.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121387

FreeRDP 2.0.0 before 3.32.2 Out-of-Bounds Read via GSM610/WAV49 Decoder

FreeRDP 2.0.0 before 3.32.2 contains an out-of-bounds read vulnerability in freerdp_dsp_decode_gsm610 that allows malicious RDP servers to read past audio buffers by sending truncated GSM610 frames. Attackers can negotiate GSM610 on rdpsnd and send a WAVE2 message shorter than a 33- or 32-byte WAV49 frame to crash the client.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121410

FreeRDP before 3.32.2 Denial of Service via RDPGFX ALPHA WIRETOSURFACE_2

FreeRDP before 3.32.2 contains a denial of service vulnerability in the RDPGFX ALPHA WIRETOSURFACE_2 handler that fails to validate zero surface dimensions. A malicious RDP server can send a crafted WIRETOSURFACE_2 PDU with zero width and height, triggering an assertion or division by zero that terminates the client session.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121406

FreeRDP before 3.32.2 Client Denial of Service via Zero-Output ZGFX Payload

FreeRDP before 3.32.2 allows a client assertion abort because rdpgfx_on_data_received rejects only negative zgfx_decompress status and passes the resulting null output pointer to Stream_StaticConstInit. A malicious RDP server can send a zero-output ZGFX payload on the RDPGFX channel after session activation to terminate the client.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121402

FreeRDP before 3.32.2 X11 Client Crash via Zero-Width RDPGFX ResetGraphics

FreeRDP before 3.32.2 contains a NULL pointer dereference vulnerability that allows malicious RDP servers to crash xfreerdp clients by sending a zero-width RDPGFX ResetGraphics PDU. The failed resize in gdi_resize_ex leaves the primary display null without ending the session, so a later bitmap update crashes the client in gdi_Bitmap_Paint.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121398

FreeRDP before 3.32.2 Use-After-Free via dyn-channel-dump Module

FreeRDP before 3.32.2 contains a cross-thread use-after-free vulnerability in the freerdp-proxy dyn-channel-dump module during session teardown. A malicious RDP target can send dynamic channel data while the front client disconnects, letting the client thread read freed ChannelData and crash the proxy process.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121394

FreeRDP before 3.32.2 Denial of Service via RemoteFX RLGR decoder

FreeRDP from 3.11.0 before 3.32.2 contains an assertion failure in the RemoteFX RLGR decoder that allows malicious servers to terminate clients. Attackers controlling an RDP server can send a RemoteFX tileset with RLGR code 32767, triggering a signed narrowing assertion in rfx_rlgr_decode and crashing the client.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121390

FreeRDP before 3.32.2 Null Pointer Crash via ARM Gateway Response

FreeRDP 3.0.0 before 3.32.2 built with WITH_AAD=ON contains a reachable assertion because its ARM gateway response parser accepts a missing or non-string redirectedServerCert field and passes a null buffer to the certificate parser. A malicious or malformed user-selected gateway can return such a response to abort the client process.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121386

FreeRDP before 3.32.2 Denial of Service via WinPR PNG/JPEG Image Readers

FreeRDP before 3.32.2 contains a denial of service vulnerability in WinPR's winpr_read_png_from_buffer() and winpr_convert_from_jpeg(), which lack libpng/libjpeg error handling. A malicious RDP server or MITM can offer a malformed PNG or truncated JPEG clipboard payload, causing the client to abort or exit.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121963

FreeRDP before 3.32.2 Use-After-Free via Dynamic rdpsnd Channel Close

FreeRDP before 3.32.2 contains a use-after-free vulnerability in the asynchronous dynamic rdpsnd channel that allows malicious RDP servers to trigger freed callback access by closing the channel with queued audio PDUs. Attackers can send a training PDU then close the channel so the playback thread reads the freed callback in rdpsnd_virtual_channel_write, crashing the client.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121950

FreeRDP before 3.32.2 Heap Overflow via RDPGFX CREATE_SURFACE Integer Wrap

FreeRDP before 3.32.2 does not check the product of surface dimensions in gdi_CreateSurface when handling an RDPGFX CREATE_SURFACE PDU, causing an integer wrap and heap buffer overflow on 32-bit builds and an approximately 4 GiB allocation on 64-bit builds. A malicious RDP server can send a CREATE_SURFACE PDU with width and height 32766 to a connecting client to corrupt heap memory or cause a denial of service.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121951

FreeRDP 3.0.0 before 3.32.2 Denial of Service via Slow-Path Input Event

FreeRDP 3.0.0 before 3.32.2 server-side RDP peer input parsing skips the six-byte body of a slow-path input event with an unknown message type without checking it lies within the packet's declared length, causing a WinPR stream assertion failure. A remote RDP client with an active session can send a truncated unknown input event to abort assertion-enabled server processes, causing denial of service.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121952

FreeRDP before 3.32.2 Proxy Out-of-Bounds Write via Bitmap Cache v2 Capability

FreeRDP before 3.32.2 has an out-of-bounds write in the proxy because rdp_read_bitmap_cache_v2_capability_set rejects only numCellCaches values above 5, yet the bitmap cache v2 cell array is later accessed at fixed indices 0 through 4. A client connecting to the proxy can declare fewer than five cell caches in its Confirm Active, causing heap corruption, heap data leakage to the backend, or a crash.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp
CVE-2026-121953

FreeRDP before 3.32.2 Use-After-Free via rdpgfx Dynamic Virtual Channel Close

FreeRDP before 3.32.2 has a use-after-free in the client's rdpgfx dynamic virtual channel: a duplicate-name channel with a new ChannelId overwrites the listener's single callback slot, which rdpgfx_on_close frees without clearing. A malicious RDP server can open and close such a channel, then send a PDU on the original channel to crash the client or potentially execute code.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Freerdp
Products
Freerdp