CVE-2026-23533 FreeRDP has heap-buffer-overflow in clear_decompress_residual_data

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the RDPGFX ClearCodec decode path when maliciously crafted residual data causes out-of-bounds writes during color output. A malicious server can trigger a...

CVE-2026-23533 FreeRDP has heap-buffer-overflow in clear_decompress_residual_data

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the RDPGFX ClearCodec decode path when maliciously crafted residual data causes out-of-bounds writes during color output. A malicious server can trigger a...

CVE-2026-23533 FreeRDP has heap-buffer-overflow in clear_decompress_residual_data

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the RDPGFX ClearCodec decode path when maliciously crafted residual data causes out-of-bounds writes during color output. A malicious server can trigger a...

CVE-2026-23531

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, in ClearCodec, when glyphData is present, cleardecompress calls freerdpimagecopynooverlap without validating the destination rectangle, allowing an out-of-bounds read/write via crafted RDPGFX surface updates...

CVE-2026-23531

Summary: CVE-2026-23531 affects FreeRDP before 3.21.0 through a flawed destination-rectangle validation in ClearCodec during RDPGFX surface updates, enabling an out-of-bounds read/write and a client-side heap buffer overflow. This can crash the client (DoS) and, depending on allocator/heap layout...

CVE-2026-23531

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, in ClearCodec, when "glyphData" is present, "cleardecompress" calls "freerdpimagecopynooverlap" without validating the destination rectangle, allowing an out-of-bounds read/write via crafted RDPGFX surface...

EUVD-2026-3317

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, in ClearCodec, when glyphData is present, cleardecompress calls freerdpimagecopynooverlap without validating the destination rectangle, allowing an out-of-bounds read/write via crafted RDPGFX surface updates...

CVE-2026-23531

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, in ClearCodec, when glyphData is present, cleardecompress calls freerdpimagecopynooverlap without validating the destination rectangle, allowing an out-of-bounds read/write via crafted RDPGFX surface updates...

Linux Distros Unpatched Vulnerability : CVE-2026-23533

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the RDPGFX ClearCodec...

CVE-2026-23531: Heap-based Buffer Overflow

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, in ClearCodec, when glyphData is present, cleardecompress calls freerdpimagecopynooverlap without validating the destination rectangle, allowing an out-of-bounds read/write via crafted RDPGFX surface updates...

CVE-2026-23533: Heap-based Buffer Overflow

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the RDPGFX ClearCodec decode path when maliciously crafted residual data causes out-of-bounds writes during color output. A malicious server can trigger a...

FreeRDP security vulnerabilities

FreeRDP is an open-source RDP protocol implementation developed by the FreeRDP team. Versions of FreeRDP prior to 3.21.0 contained security vulnerabilities. These vulnerabilities stemmed from specially crafted residual data in the RDP GFX ClearCodec decoding path, which could lead to out-of-bound...

CVE-2026-23534: Heap-based Buffer Overflow

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the ClearCodec bands decode path when crafted band coordinates allow writes past the end of the destination surface buffer. A malicious server can trigger a...

FreeRDP security vulnerabilities

FreeRDP is an open-source RDP protocol implementation developed by the FreeRDP team. Versions of FreeRDP prior to 3.21.0 contained security vulnerabilities. These vulnerabilities stemmed from specially crafted band coordinates in the ClearCodec decoding path, which allowed writing beyond the targ...

PT-2026-3458

Name of the Vulnerable Software and Affected Versions FreeRDP versions prior to 3.21.0 Description A heap buffer overflow exists in the RDPGFX ClearCodec decode path when processing maliciously crafted residual data, leading to out-of-bounds writes during color output. This can cause a...

PT-2026-3459

Name of the Vulnerable Software and Affected Versions FreeRDP versions prior to 3.21.0 Description FreeRDP, a free implementation of the Remote Desktop Protocol, contains a client-side heap buffer overflow in the ClearCodec bands decode path. Crafted band coordinates can cause writes beyond the...