CVE-2026-22853 - Vulnerability Details - OpenCVE

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR’s NDR array reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed in 3.20.1.

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact total

No data.

No data.

No data.

No data.

References

Link	Providers
https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-47v9-p4gp-w5ch

History

Wed, 14 Jan 2026 21:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Wed, 14 Jan 2026 18:00:00 +0000

Type	Values Removed	Values Added
Description		FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR’s NDR array reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed in 3.20.1.
Title		FreeRDP has a heap-buffer-overflow in ndr_read_uint8Array
Weaknesses		CWE-787
References		https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1 https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-47v9-p4gp-w5ch
Metrics		cvssV4_0 `{'score': 6.8, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P'}`

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-01-14T17:46:50.159Z

Updated: 2026-01-14T21:04:53.435Z

Reserved: 2026-01-12T16:20:16.745Z

Link: CVE-2026-22853

Vulnrichment

Updated: 2026-01-14T21:04:50.720Z

NVD

Status : Received

Published: 2026-01-14T18:16:42.790

Modified: 2026-01-14T18:16:42.790

Link: CVE-2026-22853

Redhat

No data.

OpenCVE Enrichment

No data.

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