CVE-2026-22852

FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft's open specifications. This package provides the client applications xfreerdp.

Security Fix(es):

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22852)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when the cbAttrLen parameter does not match the actual NDR (Network Data Representation) buffer length. An attacker could potentially exploit this vulnerability to read sensitive information from process memory or cause the application to crash.(CVE-2026-22855)

A malicious server can trigger a client-side use after free, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22856)

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout. The vulnerability exists in the irp_thread_func function.(CVE-2026-22857)

A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22859)

A heap-based buffer overflow vulnerability exists in FreeRDP within the planar_decompress_plane_rle function, which may lead to memory corruption and arbitrary code execution.(CVE-2026-23530)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a heap buffer overflow vulnerability existed in the ClearCodec component. Specifically, when glyphData is present, the clear_decompress function calls freerdp_image_copy_no_overlap without validating the destination rectangle. This allows for out-of-bounds read/write operations when processing crafted RDPGFX surface updates. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23531)

A heap-buffer-overflow vulnerability exists in FreeRDP software that could allow an attacker to execute arbitrary code or cause denial of service on affected systems. This vulnerability affects the gdi_SurfaceToSurface function and is present in versions 3.20.2 and earlier.(CVE-2026-23532)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the RDPGFX ClearCodec decode path, specifically in the clear_decompress_residual_data function. When processing maliciously crafted residual data, out-of-bounds writes occur during color output. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23533)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the ClearCodec bands decode path. When a malicious server sends crafted band coordinates, it allows writes past the end of the destination surface buffer. This can be exploited to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potentially leading to heap corruption with the risk of arbitrary code execution, depending on allocator behavior and surrounding heap layout.(CVE-2026-23534)

FreeRDP is a free implementation of the…

FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft's open specifications. This package provides the client applications xfreerdp.

Security Fix(es):

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22852)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when the cbAttrLen parameter does not match the actual NDR (Network Data Representation) buffer length. An attacker could potentially exploit this vulnerability to read sensitive information from process memory or cause the application to crash.(CVE-2026-22855)

A malicious server can trigger a client-side use after free, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22856)

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout. The vulnerability exists in the irp_thread_func function.(CVE-2026-22857)

A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22859)

A heap-based buffer overflow vulnerability exists in FreeRDP within the planar_decompress_plane_rle function, which may lead to memory corruption and arbitrary code execution.(CVE-2026-23530)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a heap buffer overflow vulnerability existed in the ClearCodec component. Specifically, when glyphData is present, the clear_decompress function calls freerdp_image_copy_no_overlap without validating the destination rectangle. This allows for out-of-bounds read/write operations when processing crafted RDPGFX surface updates. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23531)

A heap-buffer-overflow vulnerability exists in FreeRDP software that could allow an attacker to execute arbitrary code or cause denial of service on affected systems. This vulnerability affects the gdi_SurfaceToSurface function and is present in versions 3.20.2 and earlier.(CVE-2026-23532)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the RDPGFX ClearCodec decode path, specifically in the clear_decompress_residual_data function. When processing maliciously crafted residual data, out-of-bounds writes occur during color output. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23533)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the ClearCodec bands decode path. When a malicious server sends crafted band coordinates, it allows writes past the end of the destination surface buffer. This can be exploited to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potentially leading to heap corruption with the risk of arbitrary code execution, depending on allocator behavior and surrounding heap layout.(CVE-2026-23534)

FreeRDP is a free implementation of the…

FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft's open specifications. This package provides the client applications xfreerdp.

Security Fix(es):

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22852)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when the cbAttrLen parameter does not match the actual NDR (Network Data Representation) buffer length. An attacker could potentially exploit this vulnerability to read sensitive information from process memory or cause the application to crash.(CVE-2026-22855)

A malicious server can trigger a client-side use after free, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22856)

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout. The vulnerability exists in the irp_thread_func function.(CVE-2026-22857)

A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22859)

A heap-based buffer overflow vulnerability exists in FreeRDP within the planar_decompress_plane_rle function, which may lead to memory corruption and arbitrary code execution.(CVE-2026-23530)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a heap buffer overflow vulnerability existed in the ClearCodec component. Specifically, when glyphData is present, the clear_decompress function calls freerdp_image_copy_no_overlap without validating the destination rectangle. This allows for out-of-bounds read/write operations when processing crafted RDPGFX surface updates. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23531)

A heap-buffer-overflow vulnerability exists in FreeRDP software that could allow an attacker to execute arbitrary code or cause denial of service on affected systems. This vulnerability affects the gdi_SurfaceToSurface function and is present in versions 3.20.2 and earlier.(CVE-2026-23532)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the RDPGFX ClearCodec decode path, specifically in the clear_decompress_residual_data function. When processing maliciously crafted residual data, out-of-bounds writes occur during color output. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23533)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the ClearCodec bands decode path. When a malicious server sends crafted band coordinates, it allows writes past the end of the destination surface buffer. This can be exploited to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potentially leading to heap corruption with the risk of arbitrary code execution, depending on allocator behavior and surrounding heap layout.(CVE-2026-23534)

FreeRDP is a free implementation of the…

FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft's open specifications. This package provides the client applications xfreerdp.

Security Fix(es):

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22852)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap-buffer-overflow occurs in drive read when a server-controlled read length is used to read file data into an IRP output stream buffer without a hard upper bound, allowing an oversized read to overwrite heap memory. This vulnerability is fixed in 3.20.1.(CVE-2026-22854)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when the cbAttrLen parameter does not match the actual NDR (Network Data Representation) buffer length. An attacker could potentially exploit this vulnerability to read sensitive information from process memory or cause the application to crash.(CVE-2026-22855)

A malicious server can trigger a client-side use after free, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22856)

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout. The vulnerability exists in the irp_thread_func function.(CVE-2026-22857)

A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22859)

A heap-based buffer overflow vulnerability exists in FreeRDP within the planar_decompress_plane_rle function, which may lead to memory corruption and arbitrary code execution.(CVE-2026-23530)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a heap buffer overflow vulnerability existed in the ClearCodec component. Specifically, when glyphData is present, the clear_decompress function calls freerdp_image_copy_no_overlap without validating the destination rectangle. This allows for out-of-bounds read/write operations when processing crafted RDPGFX surface updates. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23531)

A heap-buffer-overflow vulnerability exists in FreeRDP software that could allow an attacker to execute arbitrary code or cause denial of service on affected systems. This vulnerability affects the gdi_SurfaceToSurface function and is present in versions 3.20.2 and earlier.(CVE-2026-23532)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the RDPGFX ClearCodec decode path, specifically in the clear_decompress_residual_data function. When processing maliciously crafted residual data, out-of-bounds writes occur during color output. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23533)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the ClearCodec bands decode path. When a malicious server sends crafted band coordinates, it allows writes…

FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft's open specifications. This package provides the client applications xfreerdp.

Security Fix(es):

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22852)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap-buffer-overflow occurs in drive read when a server-controlled read length is used to read file data into an IRP output stream buffer without a hard upper bound, allowing an oversized read to overwrite heap memory. This vulnerability is fixed in 3.20.1.(CVE-2026-22854)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when the cbAttrLen parameter does not match the actual NDR (Network Data Representation) buffer length. An attacker could potentially exploit this vulnerability to read sensitive information from process memory or cause the application to crash.(CVE-2026-22855)

A malicious server can trigger a client-side use after free, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22856)

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout. The vulnerability exists in the irp_thread_func function.(CVE-2026-22857)

A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22859)

A heap-based buffer overflow vulnerability exists in FreeRDP within the planar_decompress_plane_rle function, which may lead to memory corruption and arbitrary code execution.(CVE-2026-23530)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a heap buffer overflow vulnerability existed in the ClearCodec component. Specifically, when glyphData is present, the clear_decompress function calls freerdp_image_copy_no_overlap without validating the destination rectangle. This allows for out-of-bounds read/write operations when processing crafted RDPGFX surface updates. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23531)

A heap-buffer-overflow vulnerability exists in FreeRDP software that could allow an attacker to execute arbitrary code or cause denial of service on affected systems. This vulnerability affects the gdi_SurfaceToSurface function and is present in versions 3.20.2 and earlier.(CVE-2026-23532)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the RDPGFX ClearCodec decode path, specifically in the clear_decompress_residual_data function. When processing maliciously crafted residual data, out-of-bounds writes occur during color output. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23533)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the ClearCodec bands decode path. When a malicious server sends crafted band coordinates, it allows writes…

FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft's open specifications. This package provides the client applications xfreerdp.

Security Fix(es):

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22852)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when the cbAttrLen parameter does not match the actual NDR (Network Data Representation) buffer length. An attacker could potentially exploit this vulnerability to read sensitive information from process memory or cause the application to crash.(CVE-2026-22855)

A malicious server can trigger a client-side use after free, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22856)

A malicious server can trigger a client-side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout. The vulnerability exists in the irp_thread_func function.(CVE-2026-22857)

A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout.(CVE-2026-22859)

A heap-based buffer overflow vulnerability exists in FreeRDP within the planar_decompress_plane_rle function, which may lead to memory corruption and arbitrary code execution.(CVE-2026-23530)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a heap buffer overflow vulnerability existed in the ClearCodec component. Specifically, when glyphData is present, the clear_decompress function calls freerdp_image_copy_no_overlap without validating the destination rectangle. This allows for out-of-bounds read/write operations when processing crafted RDPGFX surface updates. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23531)

A heap-buffer-overflow vulnerability exists in FreeRDP software that could allow an attacker to execute arbitrary code or cause denial of service on affected systems. This vulnerability affects the gdi_SurfaceToSurface function and is present in versions 3.20.2 and earlier.(CVE-2026-23532)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the RDPGFX ClearCodec decode path, specifically in the clear_decompress_residual_data function. When processing maliciously crafted residual data, out-of-bounds writes occur during color output. A malicious server can exploit this to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potential heap corruption. Depending on allocator behavior and surrounding heap layout, there is a risk of arbitrary code execution.(CVE-2026-23533)

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP). Prior to version 3.21.0, a client-side heap buffer overflow vulnerability exists in the ClearCodec bands decode path. When a malicious server sends crafted band coordinates, it allows writes past the end of the destination surface buffer. This can be exploited to trigger a client-side heap buffer overflow, causing a crash (Denial of Service) and potentially leading to heap corruption with the risk of arbitrary code execution, depending on allocator behavior and surrounding heap layout.(CVE-2026-23534)

FreeRDP is a free implementation of the…

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 heap-use-after-free (CVE-2026-22856)

• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22854)

• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22852)

• freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow (CVE-2026-23732)

• freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation (CVE-2026-24676)

• freerdp: FreeRDP has a heap-use-after-free in video_timer (CVE-2026-24491)

• freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() (CVE-2026-23948)

• freerdp: FreeRDP has a Heap-use-after-free in play_thread (CVE-2026-24684)

• freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb (CVE-2026-24681)

• freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event (CVE-2026-24683)

• freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface (CVE-2026-24679)

• freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface (CVE-2026-24675)

• freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages (CVE-2026-31806)

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.

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 heap-use-after-free (CVE-2026-22856)

• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22854)

• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22852)

• freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow (CVE-2026-23732)

• freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation (CVE-2026-24676)

• freerdp: FreeRDP has a heap-use-after-free in video_timer (CVE-2026-24491)

• freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() (CVE-2026-23948)

• freerdp: FreeRDP has a Heap-use-after-free in play_thread (CVE-2026-24684)

• freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb (CVE-2026-24681)

• freerdp: FreeRDP has a Heap-buffer-overflow in audio_formats_free (CVE-2026-24682)

• freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event (CVE-2026-24683)

• freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface (CVE-2026-24679)

• freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface (CVE-2026-24675)

• freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages (CVE-2026-31806)

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.

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 heap-use-after-free (CVE-2026-22856)

• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22854)

• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22852)

• freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow (CVE-2026-23732)

• freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation (CVE-2026-24676)

• freerdp: FreeRDP has a heap-use-after-free in video_timer (CVE-2026-24491)

• freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() (CVE-2026-23948)

• freerdp: FreeRDP has a Heap-use-after-free in play_thread (CVE-2026-24684)

• freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb (CVE-2026-24681)

• freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event (CVE-2026-24683)

• freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface (CVE-2026-24679)

• freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface (CVE-2026-24675)

• freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages (CVE-2026-31806)

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.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a malicious RDP server can trigger a heap-buffer-overflow write in the FreeRDP client when processing Audio Input (AUDIN) format lists. audin_process_formats reuses callback->formats_count across multiple MSG_SNDIN_FORMATS PDUs and writes past the newly allocated formats array, causing memory corruption and a crash. This vulnerability is fixed in 3.20.1.

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 heap-use-after-free (CVE-2026-22856)
• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22854)
• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22852)
• freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow (CVE-2026-23732)
• freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation (CVE-2026-24676)
• freerdp: FreeRDP has a heap-use-after-free in video_timer (CVE-2026-24491)
• freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() (CVE-2026-23948)
• freerdp: FreeRDP has a Heap-use-after-free in play_thread (CVE-2026-24684)
• freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb (CVE-2026-24681)
• freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event (CVE-2026-24683)
• freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface (CVE-2026-24679)
• freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface (CVE-2026-24675)
• freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages (CVE-2026-31806)

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.

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 heap-use-after-free (CVE-2026-22856)
• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22854)
• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22852)
• freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow (CVE-2026-23732)
• freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation (CVE-2026-24676)
• freerdp: FreeRDP has a heap-use-after-free in video_timer (CVE-2026-24491)
• freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() (CVE-2026-23948)
• freerdp: FreeRDP has a Heap-use-after-free in play_thread (CVE-2026-24684)
• freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb (CVE-2026-24681)
• freerdp: FreeRDP has a Heap-buffer-overflow in audio_formats_free (CVE-2026-24682)
• freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event (CVE-2026-24683)
• freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface (CVE-2026-24679)
• freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface (CVE-2026-24675)
• freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages (CVE-2026-31806)

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.

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 heap-use-after-free (CVE-2026-22856)
• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22854)
• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22852)
• freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow (CVE-2026-23732)
• freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation (CVE-2026-24676)
• freerdp: FreeRDP has a heap-use-after-free in video_timer (CVE-2026-24491)
• freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() (CVE-2026-23948)
• freerdp: FreeRDP has a Heap-use-after-free in play_thread (CVE-2026-24684)
• freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb (CVE-2026-24681)
• freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event (CVE-2026-24683)
• freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface (CVE-2026-24679)
• freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface (CVE-2026-24675)
• freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages (CVE-2026-31806)

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.

• CVE-2026-22859: fix out-of-bounds access due to missing interface index validation in urbdrc channel
• CVE-2026-23732: fix out-of-bounds read due to missing input length check in glyph conversion
• CVE-2026-23883: fix integer overflow in cursor pixel allocation and surface-to-surface rectangle clamping
• CVE-2026-22852: fix heap buffer overflow in audin_process_formats due to stale format count
• CVE-2026-23531: fix out-of-bounds read/write in clear_decompress due to missing glyphData bounds check

FreeRDP has a heap-buffer-overflow in audin_process_formats. (CVE-2026-22852) FreeRDP has a heap-buffer-overflow in drive_process_irp_read. (CVE-2026-22854) FreeRDP has a heap-buffer-overflow in smartcard_unpack_set_attrib_call. (CVE-2026-22855) FreeRDP has a heap-use-after-free in create_irp_thread. (CVE-2026-22856) FreeRDP has a heap-use-after-free in irp_thread_func. (CVE-2026-22857) FreeRDP has a heap-buffer-overflow in urb_select_configuration. (CVE-2026-22859) FreeRDP has heap-buffer-overflow in Glyph_Alloc. (CVE-2026-23732) Heap-use-after-free in update_pointer_new. (CVE-2026-23883) Heap-use-after-free in gdi_set_bounds. (CVE-2026-23884) FreeRDP has a heap-use-after-free in video_timer. (CVE-2026-24491) Buffer Overread in FreeRDP Icon Processing. (CVE-2026-26271) FreeRDP has Out-of-bounds Write. (CVE-2026-26955, CVE-2026-26965) FreeRDP has a Heap Buffer Overflow in nsc_process_message() via Unchecked SURFACE_BITS_COMMAND Bitmap Dimensions. (CVE-2026-31806) FreeRDP has a size_t underflow in ADPCM decoder leads to heap-buffer-overflow write. (CVE-2026-31883) FreeRDP has an out-of-bounds read in ADPCM decoders due to missing predictor/step_index bounds checks. (CVE-2026-31885)

These are all security issues fixed in the freerdp-3.20.2-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the freerdp2-2.11.7-4.1 package on the GA media of openSUSE Tumbleweed.

This update for freerdp2 fixes the following issues:

Changes in freerdp2:

• Multiple CVE fixes: CVE-2026-24491, bsc#1257981, CVE-2026-24675, bsc#1257982, CVE-2026-24676, bsc#1257983, CVE-2026-24679, bsc#1257986, CVE-2026-24681, bsc#1257988, CVE-2026-24682, bsc#1257989, CVE-2026-24683, bsc#1257990, CVE-2026-24684, bsc#1257991, CVE-2026-22852, bsc#1256718, CVE-2026-22854, bsc#1256720, CVE-2026-22856, bsc#1256722, CVE-2026-22859, bsc#1256725, CVE-2026-23530, bsc#1256940, CVE-2026-23531, bsc#1256941, CVE-2026-23532, bsc#1256942, CVE-2026-23534, bsc#1256944.

• Fix build issue in h264_ffmpeg.c (ffmpeg 7).

• Add upstream fixes (picked from Debian) (boo#1231317)

This update for freerdp fixes the following issues:

Update to version 3.22.0 (jsc#PED-15526):

• Major bugfix release:

  • Complete overhaul of SDL client
  • Introduction of new WINPR_ATTR_NODISCARD macro wrapping compiler or C language version specific [[nodiscard]] attributes
  • Addition of WINPR_ATTR_NODISCARD to (some) public API functions so usage errors are producing warnings now
  • Add some more stringify functions for logging
  • We've received CVE reports, check https://github.com/FreeRDP/FreeRDP/security/advisories for more details! @Keryer reported an issue affecting client and proxy:
    • CVE-2026-23948 @ehdgks0627 did some more fuzzying and found quite a number of client side bugs.
    • CVE-2026-24682
    • CVE-2026-24683
    • CVE-2026-24676
    • CVE-2026-24677
    • CVE-2026-24678
    • CVE-2026-24684
    • CVE-2026-24679
    • CVE-2026-24681
    • CVE-2026-24675
    • CVE-2026-24491
    • CVE-2026-24680

• Changes from version 3.21.0

  • [core,info] fix missing NULL check (#12157)
  • [gateway,tsg] fix TSG_PACKET_RESPONSE parsing (#12161)
  • Allow querying auth identity with kerberos when running as a server (#12162)
  • Sspi krb heimdal (#12163)
  • Tsg fix idleTimeout parsing (#12167)
  • [channels,smartcard] revert 649f7de (#12166)
  • [crypto] deprecate er and der modules (#12170)
  • [channels,rdpei] lock full update, not only parts (#12175)
  • [winpr,platform] add WINPR_ATTR_NODISCARD macro (#12178)
  • Wlog cleanup (#12179)
  • new stringify functions & touch API defines (#12180)
  • Add support for querying SECPKG_ATTR_PACKAGE_INFO to NTLM and Kerberos (#12171)
  • [channels,video] measure times in ns (#12184)
  • [utils] Nodiscard (#12187)
  • Error handling fixes (#12186)
  • [channels,drdynvc] check pointer before reset (#12189)
  • Winpr api def (#12190)
  • [winpr,platform] drop C23 [[nodiscard]] (#12192)
  • [gdi] add additional checks for a valid rdpGdi (#12194)
  • Sdl3 high dpiv2 (#12173)
  • peer: Disconnect if Logon() returned FALSE (#12196)
  • [channels,rdpecam] fix PROPERTY_DESCRIPTION parsing (#12197)
  • [channel,rdpsnd] only clean up thread before free (#12199)
  • [channels,rdpei] add RDPINPUT_CONTACT_FLAG_UP (#12195)

• Update to version 3.21.0:

  • Bugfix release with a few new API functions addressing shortcomings with regard to input data validation. Thanks to @ehdgks0627 we have fixed the following additional (medium) client side vulnerabilities:

    • CVE-2026-23530
    • CVE-2026-23531
    • CVE-2026-23532
    • CVE-2026-23533
    • CVE-2026-23534
    • CVE-2026-23732
    • CVE-2026-23883
    • CVE-2026-23884

• Changes from version 3.20.2

  • [client,sdl] fix monitor resolution (#12142)
  • [codec,progressive] fix progressive_rfx_upgrade_block (#12143)
  • Krb cache fix (#12145)
  • Rdpdr improved checks (#12141)
  • Codec advanced length checks (#12146)
  • Glyph fix length checks (#12151)
  • Wlog printf format string checks (#12150)
  • [warnings,format] fix format string warnings (#12152)
  • Double free fixes (#12153)
  • [clang-tidy] clean up code warnings (#12154)

• Update to version 3.20.2:

  • Patch release fixing a regression with gateway connections introduced with 3.20.1

    What's Changed

    • Warnings and missing enumeration types (#12137)

• Changes from version 3.20.1:

  • New years cleanup release. Fixes some issues reported and does a cleaning sweep to bring down warnings. Thanks to @ehdgks0627 doing some code review/testing we've uncovered the following (medium) vulnerabilities:

    • CVE-2026-22851
    • CVE-2026-22852
    • CVE-2026-22853
    • CVE-2026-22854
    • CVE-2026-22855
    • CVE-2026-22856
    • CVE-2026-22857
    • CVE-2026-22858
    • CVE-2026-22859

  • These affect FreeRDP based clients only, with the exception of CVE-2026-22858 also affecting FreeRDP proxy. FreeRDP based servers are not affected.

• Update to version 3.20.0:

  *…

This update for freerdp fixes the following issues:

• CVE-2025-4478: Fixed initialization of function pointers after resource allocations (bsc#1243109)
• CVE-2026-22851: Fixed RDPGFX ResetGraphics race leading to use-after-free in SDL client (sdl->primary) (bsc#1256717)
• CVE-2026-22852: Fixed heap-buffer-overflow in audin_process_formats (bsc#1256718)
• CVE-2026-22853: Fixed heap-buffer-overflow in ndr_read_uint8Array (bsc#1256719)
• CVE-2026-22854: Fixed heap-buffer-overflow in drive_process_irp_read (bsc#1256720)
• CVE-2026-22855: Fixed heap-buffer-overflow in smartcard_unpack_set_attrib_call (bsc#1256721)
• CVE-2026-22856: Fixed heap-use-after-free in create_irp_thread (bsc#1256722)
• CVE-2026-22857: Fixed heap-use-after-free in irp_thread_func (bsc#1256723)
• CVE-2026-22858: Fixed global-buffer-overflow in crypto_base64_devoce (bsc#1256724)
• CVE-2026-22859: Fixed heap-buffer-overflow in urb_select_configuration (bsc#1256725)
• CVE-2026-23530: Fixed improper validation leading to heap buffer overflow in planar_decompress_plane_rle (bsc#1256940)
• CVE-2026-23531: Fixed improper validation in clear_decompress leading to heap buffer overflow (bsc#1256941)
• CVE-2026-23532: Fixed mismatch between destination rectangle clamping and the actual copy size leading to heap buffer overflow in gdi_SurfaceToSurface (bsc#1256942)
• CVE-2026-23533: Fixed improper validation leading to heap buffer overflow in clear_decompress_residual_data (bsc#1256943)
• CVE-2026-23534: Fixed missing checks leading to heap buffer overflow in clear_deceompress_bands_data (bsc#1256944)
• CVE-2026-23732: Fixed improper validation leading to heap buffer overflow in Glyph_alloc (bsc#1256945)
• CVE-2026-23883: Fixed use-after-free when update_pointer_color and freerdp_image_copy_fromPointer_data fail (bsc#1256946)
• CVE-2026-23884: Fixed use-after-free in gdi_set_bounds (bsc#1256947)

This update for freerdp fixes the following issues:

• CVE-2026-22852: a malicious RDP server can trigger a heap-buffer-overflow in audin_process_formats (bsc#1256718).
• CVE-2026-22854: server-controlled read length is used to read file data into an IRP output can cause heap-buffer-overflow in drive_process_irp_read (bsc#1256720).
• CVE-2026-22856: race condition in the serial channel IRP thread tracking can cause heap-use-after-free in create_irp_thread(bsc#1256722).
• CVE-2026-22859: improper bound check can lead to heap-buffer-overflow in urb_select_configuration (bsc#1256725).
• CVE-2026-23530: improper validation can lead to heap buffer overflow in planar_decompress_plane_rle (bsc#1256940).
• CVE-2026-23531: improper validation in clear_decompress can lead to heap buffer overflow (bsc#1256941).
• CVE-2026-23532: mismatch between destination rectangle clamping and the actual copy size can lead to a heap buffer overflow in gdi_SurfaceToSurface (bsc#1256942).
• CVE-2026-23534: missing checks can lead to heap buffer overflow in clear_decompress_bands_data (bsc#1256944).

This update for freerdp fixes the following issues:

• CVE-2026-22852: a malicious RDP server can trigger a heap-buffer-overflow in audin_process_formats (bsc#1256718).
• CVE-2026-22854: server-controlled read length is used to read file data into an IRP output can cause heap-buffer-overflow in drive_process_irp_read (bsc#1256720).
• CVE-2026-22856: race condition in the serial channel IRP thread tracking can cause heap-use-after-free in create_irp_thread(bsc#1256722).
• CVE-2026-22859: improper bound check can lead to heap-buffer-overflow in urb_select_configuration (bsc#1256725).
• CVE-2026-23530: improper validation can lead to heap buffer overflow in planar_decompress_plane_rle (bsc#1256940).
• CVE-2026-23531: improper validation in clear_decompress can lead to heap buffer overflow (bsc#1256941).
• CVE-2026-23532: mismatch between destination rectangle clamping and the actual copy size can lead to a heap buffer overflow in gdi_SurfaceToSurface (bsc#1256942).
• CVE-2026-23534: missing checks can lead to heap buffer overflow in clear_decompress_bands_data (bsc#1256944).

This update for freerdp2 fixes the following issues:

• CVE-2026-22852: a malicious RDP server can trigger a heap-buffer-overflow in audin_process_formats (bsc#1256718).
• CVE-2026-22854: server-controlled read length is used to read file data into an IRP output can cause heap-buffer-overflow in drive_process_irp_read (bsc#1256720).
• CVE-2026-22856: race condition in the serial channel IRP thread tracking can cause heap-use-after-free in create_irp_thread(bsc#1256722).
• CVE-2026-22859: improper bound check can lead to heap-buffer-overflow in urb_select_configuration (bsc#1256725).
• CVE-2026-23530: improper validation can lead to heap buffer overflow in planar_decompress_plane_rle (bsc#1256940).
• CVE-2026-23531: improper validation in clear_decompress can lead to heap buffer overflow (bsc#1256941).
• CVE-2026-23532: mismatch between destination rectangle clamping and the actual copy size can lead to a heap buffer overflow in gdi_SurfaceToSurface (bsc#1256942).
• CVE-2026-23534: missing checks can lead to heap buffer overflow in clear_decompress_bands_data (bsc#1256944).

This update for freerdp fixes the following issues:

• CVE-2026-22852: a malicious RDP server can trigger a heap-buffer-overflow in audin_process_formats (bsc#1256718).
• CVE-2026-22854: server-controlled read length is used to read file data into an IRP output can cause heap-buffer-overflow in drive_process_irp_read (bsc#1256720).
• CVE-2026-22856: race condition in the serial channel IRP thread tracking can cause heap-use-after-free in create_irp_thread(bsc#1256722).
• CVE-2026-22859: improper bound check can lead to heap-buffer-overflow in urb_select_configuration (bsc#1256725).
• CVE-2026-23530: improper validation can lead to heap buffer overflow in planar_decompress_plane_rle (bsc#1256940).
• CVE-2026-23531: improper validation in clear_decompress can lead to heap buffer overflow (bsc#1256941).
• CVE-2026-23532: mismatch between destination rectangle clamping and the actual copy size can lead to a heap buffer overflow in gdi_SurfaceToSurface (bsc#1256942).
• CVE-2026-23534: missing checks can lead to heap buffer overflow in clear_decompress_bands_data (bsc#1256944).

It was discovered that FreeRDP incorrectly handled certain RDP packets. A remote attacker could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code.