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CVE-2026-22852— FreeRDP has a heap-buffer-overflow in audin_process_formats

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 3.20.1之前版本存在缓冲区错误漏洞，该漏洞源于处理音频输入格式列表时，恶意RDP服务器可触发堆缓冲区溢出写入，可能导致内存损坏和崩溃。

AI Predicted 9.8 Difficulty: Easy EPSS 0.42% · P34

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-22852

Vulnerability Information
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Vulnerability Title
FreeRDP has a heap-buffer-overflow in audin_process_formats
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
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 3.20.1之前版本存在缓冲区错误漏洞，该漏洞源于处理音频输入格式列表时，恶意RDP服务器可触发堆缓冲区溢出写入，可能导致内存损坏和崩溃。
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 < 3.20.1 -

II. Public POCs for CVE-2026-22852

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III. Intelligence Information for CVE-2026-22852

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Same Patch Batch · FreeRDP · 2026-01-14 · 9 CVEs total

CVE-2026-22853 6.8 MEDIUM FreeRDP has a heap-buffer-overflow in ndr_read_uint8Array
CVE-2026-22855 5.6 MEDIUM FreeRDP has a heap-buffer-overflow in smartcard_unpack_set_attrib_call
CVE-2026-22858 5.6 MEDIUM FreeRDP has a global-buffer-overflow in crypto_base64_decode
CVE-2026-22859 5.6 MEDIUM FreeRDP has a heap-buffer-overflow in urb_select_configuration
CVE-2026-22851 FreeRDP RDPGFX ResetGraphics race leads to use-after-free in SDL client (sdl->primary)
CVE-2026-22854 FreeRDP has a heap-buffer-overflow in drive_process_irp_read
CVE-2026-22857 FreeRDP has a heap-use-after-free in irp_thread_func
CVE-2026-22856 FreeRDP has a heap-use-after-free in create_irp_thread

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-787

V. Comments for CVE-2026-22852

Anonymous User
2026-01-15 06:08:15

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