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CVE-2026-25941— FreeRDP: vuln_1_15_1 RDPGFX WIRE_TO_SURFACE_2 Out-of-Bounds Read

Quick assessment

Affected
FreeRDP FreeRDP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP 2.11.8之前版本和3.23.0之前版本存在缓冲区错误漏洞，该漏洞源于RDPGFX通道存在越界读取，可能导致恶意RDP服务器读取未初始化的堆内存，造成信息泄露或客户端崩溃。

CVSS 4.3 · Medium EPSS 0.28% · P21
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I. Basic Information for CVE-2026-25941

Vulnerability Information
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Vulnerability Title
FreeRDP: vuln_1_15_1 RDPGFX WIRE_TO_SURFACE_2 Out-of-Bounds Read
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Versions on the 2.x branch prior to to 2.11.8 and on the 3.x branch prior to 3.23.0 have an out-of-bounds read vulnerability in the FreeRDP client's RDPGFX channel that allows a malicious RDP server to read uninitialized heap memory by sending a crafted WIRE_TO_SURFACE_2 PDU with a `bitmapDataLength` value larger than the actual data in the packet. This can lead to information disclosure or client crashes when a user connects to a malicious server. Versions 2.11.8 and 3.23.0 fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP 2.11.8之前版本和3.23.0之前版本存在缓冲区错误漏洞，该漏洞源于RDPGFX通道存在越界读取，可能导致恶意RDP服务器读取未初始化的堆内存，造成信息泄露或客户端崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP >= 2.0.0, < 2.11.8 -

II. Public POCs for CVE-2026-25941

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III. Intelligence Information for CVE-2026-25941

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Vendor Advisories for CVE-2026-25941 (1)

Same Patch Batch · FreeRDP · 2026-02-25 · 15 CVEs total

CVE-2026-26955 8.8 HIGH FreeRDP has Out-of-bounds Write
CVE-2026-26965 8.8 HIGH FreeRDP has Out-of-bounds Write
CVE-2026-27951 5.3 MEDIUM FreeRDP has possible Integer overflow in Stream_EnsureCapacity
CVE-2026-25942 FreeRDP has global-buffer-overflow in xf_rail_server_execute_result
CVE-2026-25953 FreeRDP has heap-use-after-free in xf_AppUpdateWindowFromSurface (freed appWindow)
CVE-2026-25952 FreeRDP has heap-use-after-free in xf_SetWindowMinMaxInfo
CVE-2026-26271 Buffer Overread in FreeRDP Icon Processing
CVE-2026-25959 FreeRDP has heap-use-after-free in xf_cliprdr_provide_data_
CVE-2026-25997 FreeRDP has heap-use-after-free in xf_clipboard_format_equal
CVE-2026-25955 FreeRDP has heap-use-after-free in xf_AppUpdateWindowFromSurface (stale XImage)
CVE-2026-25954 FreeRDP has heap-use-after-free in xf_rail_server_local_move_size
CVE-2026-27015 FreeRDP: Smartcard NDR Alignment Padding Triggers Reachable WINPR_ASSERT Abort (Client DoS
CVE-2026-26986 FreeRDP has heap-use-after-free in rail_window_free
CVE-2026-27950 FreeRDP heap-use-after-free in update_pointer_new(SDL): Fix Applied in the Wrong File

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-20

V. Comments for CVE-2026-25941

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