FreeRDP up to 3.25.x planar.c freerdp_bitmap_decompress_planar out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in FreeRDP up to 3.25.x. Affected by this vulnerability is the function freerdp_bitmap_decompress_planar of the file libfreerdp/codec/planar.c. Performing a manipulation results in out-of-bounds write. This vulnerability is cataloged as CVE-2026-45700. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in FreeRDP up to 3.25.x. This affects the function freerdp_bitmap_decompress_planar of the file libfreerdp/codec/planar.c. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's planar bitmap decoder has an out-of-bounds heap write when decoding RLE planar data. In libfreerdp/codec/planar.c, freerdp_bitmap_decompress_planar() validates the X destination coordinate nXDst against the caller-provided destination stride (nDstStep) even when it is writing into the internal temp buffer pTempData. An attacker can bypass the check with a large nDstStep and a large nXDst, causing planar_decompress_plane_rle() to write past the end of pTempData. This vulnerability is fixed in 3.26.0.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-45700 since 05/13/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 318026 (Linux Distros Unpatched Vulnerability : CVE-2026-45700), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.26.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (318026), EUVD (EUVD-2026-33436) and CERT Bund (WID-SEC-2026-2264). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Open Source FreeRDP

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318026
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-45700

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreeRDP 3.26.0

Timelineinfo

05/13/2026 CVE reserved
05/30/2026 +17 days Advisory disclosed
05/30/2026 +0 days VulDB entry created
07/29/2026 +59 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-mpxh-8fq3-x8mh
Status: Confirmed

CVE: CVE-2026-45700 (🔒)
GCVE (CVE): GCVE-0-2026-45700
GCVE (VulDB): GCVE-100-367389
EUVD: 🔒
CERT Bund: WID-SEC-2026-2264 - FreeRDP: Schwachstelle ermöglicht Codeausführung

Entryinfo

Created: 05/30/2026 07:38
Updated: 07/29/2026 00:58
Changes: 05/30/2026 07:38 (69), 05/30/2026 11:19 (1), 05/31/2026 00:14 (2), 07/03/2026 01:50 (11), 07/09/2026 12:30 (7), 07/29/2026 00:58 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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