CVE-2022-39320— Heap buffer overflow in urbdrc channel
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I. Basic Information for CVE-2022-39320
Vulnerability Information
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Vulnerability Title
Heap buffer overflow in urbdrc channel
Source: NVD (National Vulnerability Database)
Vulnerability Description
FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP may attempt integer addition on too narrow types leads to allocation of a buffer too small holding the data written. A malicious server can trick a FreeRDP based client to read out of bound data and send it back to the server. This issue has been addressed in version 2.9.0 and all users are advised to upgrade. Users unable to upgrade should not use the `/usb` redirection switch.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
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存在缓冲区错误漏洞，该漏洞源于FreeRDP可能会在太窄的类型上尝试整数加法，这会导致缓冲区的分配太小，无法容纳写入的数据。
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
II. Public POCs for CVE-2022-39320
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- https://security.gentoo.org/glsa/202401-16vendor-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2022-39320
Same Patch Batch · FreeRDP · 2022-11-16 · 7 CVEs total
| CVE-2022-39316 | 4.8 MEDIUM | Out of bound read in FreeRDP |
| CVE-2022-39318 | 4.8 MEDIUM | Division by zero in urbdrc channel in FreeRDP |
| CVE-2022-39317 | 4.6 MEDIUM | Out of bounds read in zgfx decoder in FreeRDP |
| CVE-2022-39319 | 4.6 MEDIUM | Missing length validation in urbdrc channel in FreeRDP |
| CVE-2022-41877 | 4.6 MEDIUM | Missing input length validation in `drive` channel in FreeRDP |
| CVE-2022-39347 | 2.6 LOW | Missing path sanitation with `drive` channel in FreeRDP |
IV. Related Vulnerabilities
Same product: FreeRDP
- CVE-2026-40254
FreeRDP: contains_dotdot() off-by-one allows drive channel p - CVE-2026-33995
FreeRDP: Possible double free in kerberos_AcceptSecurityCont - CVE-2026-33987
FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write - CVE-2026-33986
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write - CVE-2026-33985
FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
Same vendor: FreeRDP
- CVE-2026-40254
FreeRDP: contains_dotdot() off-by-one allows drive channel p - CVE-2026-33995
FreeRDP: Possible double free in kerberos_AcceptSecurityCont - CVE-2026-33987
FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write - CVE-2026-33986
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write - CVE-2026-33985
FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
Same weakness: CWE-125
- CVE-2026-8177
XML::LibXML versions through 2.0210 for Perl read out-of-bou - CVE-2026-6104
Global buffer over-read in mb_convert_encoding() with attack - CVE-2026-7258
Out-of-bounds read in urldecode() on NetBSD - CVE-2026-8186
Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out- - CVE-2026-3508
ASUS System Control Interface 缓冲区错误漏洞
V. Comments for CVE-2022-39320
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