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CVE-2026-23948— FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()

EPSS 0.02% · P6
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I. Basic Information for CVE-2026-23948

Vulnerability Information
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Vulnerability Title
FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()
Source: NVD (National Vulnerability Database)
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
FreeRDP 代码问题漏洞
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 3.22.0之前版本存在代码问题漏洞，该漏洞源于rdp_write_logon_info_v2函数存在空指针取消引用，可能导致恶意RDP服务器使FreeRDP代理崩溃。
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

VendorProductAffected VersionsCPESubscribe
FreeRDPFreeRDP < 3.22.0 -

II. Public POCs for CVE-2026-23948

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III. Intelligence Information for CVE-2026-23948

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Same Patch Batch · FreeRDP · 2026-02-09 · 12 CVEs total

CVE-2026-24675FreeRDP has a Heap-use-after-free in urb_select_interface
CVE-2026-24679FreeRDP has a heap-buffer-overflow in urb_select_interface
CVE-2026-24677FreeRDP has a heap-buffer-overflow in ecam_encoder_compress_h264
CVE-2026-24491FreeRDP has a heap-use-after-free in video_timer
CVE-2026-24684FreeRDP has a Heap-use-after-free in play_thread
CVE-2026-24681FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb
CVE-2026-24678FreeRDP has a Heap-use-after-free in cam_v4l_stream_capture_thread
CVE-2026-24682FreeRDP has a Heap-buffer-overflow in audio_formats_free
CVE-2026-24676FreeRDP has a heap-use-after-free in audio_format_compatible
CVE-2026-24683FreeRDP has a heap-use-after-free in ainput_send_input_event
CVE-2026-24680FreeRDP has a heap-use-after-free in update_pointer_new(SDL)

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-476

V. Comments for CVE-2026-23948

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