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CVE-2026-109946

FreeRDP 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region widths are even…

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

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What to know

What it is
FreeRDP 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region widths are even before YUV444 conversion, so an odd width reaches an assertion and aborts the client. A malicious or compromised RDP server can terminate a connected FreeRDP client after RDPGFX AVC444 negotiation by sending an in-bounds reg…
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-2026-109946FreeRDP 3.11.0 before 3.32.0does not validate that AVC444and AVC444v2 region widths…CVSS 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 weaknessCWE-617 (CWE-617)59 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-2026-109946: FreeRDP 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region widths are even… (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 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region widths are even before YUV444 conversion, so an odd width reaches an assertion and aborts the client. A malicious or compromised RDP server can terminate a connected FreeRDP client after RDPGFX AVC444 negotiation by sending an in-bounds region rectangle with an odd width.

Last activity 13 Oct 2026. Patch Forecast updates every hour.