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CVE-2026-110834— FreeRDP 2.0.0 before 3.32.0 Denial of Service via Serial IRP Null Handle

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.

在 FreeRDP 2.0.0 到 3.32.0（不含 3.32.0）版本中存在空指针解引用漏洞。恶意 RDP 服务器可以通过发送生命周期外的串行 IRP（输入/输出请求包）使客户端崩溃。攻击者可以在创建（create）之前或关闭（close）之后发送 IRP_MJ_READ 或 IRP_MJ_WRITE 请求，导致 CommReadFile 或 CommWriteFile 函数对空句柄进行解引用，从而终止使用 Linux 串行重定向的客户端。

CVSS 6.5 · Medium EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
FreeRDP FreeRDP 2.0.0< 3.32.0 affected
3.32.0 unaffected
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I. Basic Information for CVE-2026-110834

Vulnerability Information
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Vulnerability Title
FreeRDP 2.0.0 before 3.32.0 Denial of Service via Serial IRP Null Handle
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP from 2.0.0 before 3.32.0 contains a null pointer dereference vulnerability that allows malicious RDP servers to crash clients by sending out-of-lifecycle serial IRPs. Attackers can send IRP_MJ_READ or IRP_MJ_WRITE before create or after close, causing CommReadFile or CommWriteFile to dereference a null handle and terminate clients using Linux serial redirection.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP 2.0.0 ~ 3.32.0 -

II. Public POCs for CVE-2026-110834

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III. Intelligence Information for CVE-2026-110834

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Other References for CVE-2026-110834 (2)

Same Patch Batch · FreeRDP · 2026-10-14 · 11 CVEs total

CVE-2026-110838 7.5 HIGH FreeRDP shadow before 3.32.0 Pre-Authentication Input Injection via Confirm Active bypass
CVE-2026-110839 7.1 HIGH FreeRDP 3.3.0 before 3.32.0 Heap Out-of-Bounds Write via Grayscale JPEG Clipboard Data
CVE-2026-110837 7.1 HIGH FreeRDP 2.0.0 before 3.32.0 Heap Buffer Overflow via MP3 Audio Decoding
CVE-2026-110829 6.5 MEDIUM FreeRDP 3.0.0 before 3.32.0 Null Pointer Dereference via rdpsnd Fragment
CVE-2026-110836 6.5 MEDIUM FreeRDP 3.0.0 before 3.32.0 Infinite Loop DoS via Gateway Content-Type
CVE-2026-110832 6.5 MEDIUM FreeRDP 2.0.0 before 3.32.0 Memory Exhaustion via DRDYNVC DATA_FIRST
CVE-2026-110830 5.9 MEDIUM FreeRDP before 3.32.0 Denial of Service via Serial IRP_MJ_CREATE
CVE-2026-110833 5.9 MEDIUM FreeRDP before 3.32.0 Unbounded Memory Retention via RDPDR Proxy
CVE-2026-110831 4.3 MEDIUM FreeRDP 3.13.0 before 3.32.0 Resource Leak via Drive Redirection IRP_MJ_CREATE
CVE-2026-110835 4.0 MEDIUM FreeRDP 3.0.0 before 3.32.0 HTTP Header Injection via Proxy Routing Token

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-110834

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