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CVE-2026-110834

Freerdp: null pointer dereference can lead to denial of service

Risk score
49/100
CVSS
6.5 v3.1
Exploit chance (30 days)
0.3%
Published
14 Oct 2026

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What to know

What it is
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 …
Affected
Freerdp before 3.32.0
Fix
Upgrade Freerdp to 3.32.0 or later.
Exploitation
Public proof of concept

Story map

Story map: FreerdpTHE FLAWSTHE FIXCVE-2026-110834Null pointer dereference canlead to denial of serviceCVSS 6.5 · EPSS 0%CVE-2026-111375Out-of-bounds read can lead todenial of serviceCVSS 9.1 · EPSS 0%CVE-2026-111382Out-of-bounds write can leadto remote code executionCVSS 8.8 · EPSS 0%CVE-2026-111380Integer overflowCVSS 8.8 · EPSS 0%Upgrade Freerdp3.32.0or later on your release lineWho is exposedFreerdp before 3.32.0AMBER · PATCH THIS WEEKFreerdpFreeRDP from 3.0.0 before3.32.0 contains anout-of-bounds read vulnerabilityin the Windows RAIL client thatallows malicious RDP servers totrigger heap over-reads bysending non-NUL-terminated…Where it standsPublic proof of conceptCONNECTS TOSame weaknessNull pointer dereference (CWE-476)92 other warnings in 30 days →Same productEarlier Freerdp warnings29 in the last 90 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Freerdp: Amber, patch this week. FreeRDP from 3.0.0 before 3.32.0 contains an out-of-bounds read vulnerability in the Windows RAIL client that allows malicious RDP servers to trigger heap over-reads by sending non-NUL-terminated window titles. Attackers can send a full-length WINDOW_ORDER_FIELD_TITLE update that wf_rail_window_common passes to SetWin…

The flaws

  • CVE-2026-110834: Null pointer dereference can lead to denial of service (CVSS 6.5 · EPSS 0%)
  • CVE-2026-111375: Out-of-bounds read can lead to denial of service (CVSS 9.1 · EPSS 0%)
  • CVE-2026-111382: Out-of-bounds write can lead to remote code execution (CVSS 8.8 · EPSS 0%)
  • CVE-2026-111380: Integer overflow (CVSS 8.8 · EPSS 0%)

The fix

Upgrade Freerdp: 3.32.0 or later on your release line

Who is exposed: Freerdp before 3.32.0

Where it stands

  • Public proof of concept

Connects to

Why it is Yellow

  • CVSS 6.5 medium
  • Public exploit or proof of concept referenced

References

Original 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.

Last activity 14 Oct 2026. Patch Forecast updates every hour.