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ALSA-2026:5939 — Important: freerdp security update

Affected: AlmaLinux:10: freerdp, AlmaLinux:10: freerdp-devel, AlmaLinux:10: freerdp-libs, AlmaLinux:10: freerdp-server, AlmaLinux:10: libwinpr, AlmaLinux:10: libwinpr-devel

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es):

* freerdp: FreeRDP: Arbitrary code execution via heap out-of-bounds write in RLE planar decode path (CVE-2026-26965) * freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in GDI surface pipeline (CVE-2026-26955)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2026-04152

cnvd-2026-12777

EUVD-2026-337435

fkie_cve-2026-26955

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a malicious RDP server can trigger a heap buffer overflow in FreeRDP clients using the GDI surface pipeline (e.g., `xfreerdp`) by sending an RDPGFX ClearCodec surface command with an out-of-bounds destination rectangle. The `gdi_SurfaceCommand_ClearCodec()` handler does not call `is_within_surface()` to validate the command rectangle against the destination surface dimensions, allowing attacker-controlled `cmd->left`/`cmd->top` (and subcodec rectangle offsets) to reach image copy routines that write into `surface->data` without bounds enforcement. The OOB write corrupts an adjacent `gdiGfxSurface` struct's `codecs*` pointer with attacker-controlled pixel data, and corruption of `codecs*` is sufficient to reach an indirect function pointer call (`NSC_CONTEXT.decode` at `nsc.c:500`) on a subsequent codec command — full instruction pointer (RIP) control demonstrated in exploitability harness. Users should upgrade to version 3.23.0 to receive a patch.

OESA-2026-2036 — freerdp security update

Affected: openEuler:24.03-LTS-SP3: freerdp

FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft&apos;s open specifications. This package provides the client applications xfreerdp. Security Fix(es):

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, in the RLE planar decode path, `planar_decompress_plane_rle()` writes into `pDstData` at `((nYDst+y) * nDstStep) + (4*nXD…

openSUSE-SU-2026:10408-1 — freerdp-3.24.1-1.1 on GA media

freerdp-3.24.1-1.1 on GA media

RHSA-2026:19033 — Red Hat Security Advisory: freerdp security update

freerdp: FreeRDP heap-buffer-overflow freerdp: FreeRDP heap-buffer-overflow freerdp: FreeRDP heap-buffer-overflow freerdp: FreeRDP heap-buffer-overflow freerdp: FreeRDP heap-use-after-free freerdp: FreeRDP global-buffer-overflow freerdp: FreeRDP heap-buffer-overflow freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() freerdp: FreeRDP has a heap-use-after-free in video_timer freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation freerdp: FreeRDP: Denial of Service via use after free in ecam_channel_write freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb freerdp: FreeRDP has a Heap-buffer-overflow in audio_formats_free freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event freerdp: FreeRDP has a Heap-use-after-free in play_thread freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in GDI surface pipeline freerdp: FreeRDP: Arbitrary code execution via heap out-of-bounds write in RLE planar decode path freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages FreeRDP: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages FreeRDP: FreeRDP: Heap buffer overflow allows arbitrary code execution via crafted…

SUSE-SU-2026:1129-1 — Security update for freerdp

Security update for freerdp

UBUNTU-CVE-2026-26955

Affected: Ubuntu:16.04:LTS: freerdp, Ubuntu:Pro:18.04:LTS: freerdp2, Ubuntu:18.04:LTS: freerdp, Ubuntu:Pro:20.04:LTS: freerdp2, Ubuntu:22.04:LTS: freerdp2, Ubuntu:24.04:LTS: freerdp3, Ubuntu:Pro:24.04:LTS: freerdp2, Ubuntu:25.10: freerdp3

WID-SEC-W-2026-0514 — FreeRDP: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in FreeRDP ausnutzen, um beliebigen Programmcode auszuführen, und um einen Denial of Service Angriff durchzuführen.