FreeRDP has heap-buffer-overflow in clear_decompress_bands_data_CVE-2026-23534

7.7 / 10

HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P

Description

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 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. Version 3.21.0 contains a patch for the issue.

Basic Information

ID CVE-2026-23534

Source GitHub_M

Published Jan 19, 2026 at 17:09

Affected Product

Vendor FreeRDP

Product FreeRDP

Version < 3.21.0

Affected Versions FreeRDP FreeRDP < 3.21.0

CWE Classification

CWE-122

References

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    "published": "2026-01-19T17:09:55.715Z",
    "modified": "2026-01-19T17:09:55.715Z",
    "type": "cve",
    "title": "FreeRDP has heap-buffer-overflow in clear_decompress_bands_data",
    "source": "GitHub_M",
    "references": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3frr-mp8w-4599\nhttps://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L878-L879\nhttps://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L883-L884\nhttps://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0",
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