CVE-2026-69159Public exploitNetwork attack vector

Client crash via unchecked planar raw-byte count

Published Aug 19, 2026 · Updated Aug 19, 2026

Out-of-bounds read in FreeRDP before 3.29.0 allows remote attackers to crash a client via a crafted planar bitmap update. In libfreerdp/codec/planar.c, planar_decompress_plane_rle and planar_decompress_plane_rle_only check only that the control byte is present, then trust its 0-15 raw-byte count and read those bytes from pSrcData without verifying the remaining source length. Reachability is post-connection: a malicious or compromised RDP server must get a client to connect, after which a truncated bitmap or surface update can interrupt the session and may disclose adjacent memory.

CVSS severity5.4
Medium
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Out-of-bounds read in FreeRDP before 3.29.0 allows remote attackers to crash a client via a crafted planar bitmap update. In libfreerdp/codec/planar.c, planar_decompress_plane_rle and planar_decompress_plane_rle_only check only that the control byte is present, then trust its 0-15 raw-byte count and read those bytes from pSrcData without verifying the remaining source length. Reachability is post-connection: a malicious or compromised RDP server must get a client to connect, after which a truncated bitmap or surface update can interrupt the session and may disclose adjacent memory.

The record

CVE
CVE-2026-69159
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
FreeRDP
Product
FreeRDP
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.29.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeRDP · FreeRDPversion=< 3.29.0

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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