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Freerdp CVE-2026-26965

HIGH
Out-of-bounds Write (CWE-787)
2026-02-25 security-advisories@github.com
Buffer Overflow Freerdp Memory Corruption
8.8
CVSS 3.1 · Vendor: github
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Severity by source

Vendor (github) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative
Red Hat
8.8 HIGH
qualitative

Primary rating from Vendor (github).

CVSS VectorVendor: github

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Feb 27, 2026 - 14:49 vuln.today
Public exploit code
Patch released
Feb 27, 2026 - 14:49 nvd
Patch available
CVE Published
Feb 25, 2026 - 21:16 nvd
HIGH 8.8

DescriptionCVE.org

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, in the RLE planar decode path, planar_decompress_plane_rle() writes into pDstData at ((nYDst+y) * nDstStep) + (4*nXDst) + nChannel without verifying that (nYDst+nSrcHeight) fits in the destination height or that (nXDst+nSrcWidth) fits in the destination stride. When TempFormat != DstFormat, pDstData becomes planar->pTempData (sized for the desktop), while nYDst is only validated against the surface by is_within_surface(). A malicious RDP server can exploit this to perform a heap out-of-bounds write with attacker-controlled offset and pixel data on any connecting FreeRDP client. The OOB write reaches up to 132,096 bytes past the temp buffer end, and on the brk heap (desktop ≤ 128×128), an adjacent NSC_CONTEXT struct's decode function pointer is overwritten with attacker-controlled pixel data - control-flow-relevant corruption (function pointer overwritten) demonstrated under deterministic heap layout (nsc->decode = 0xFF414141FF414141). Version 3.23.0 fixes the vulnerability.

AnalysisAI

FreeRDP is a free implementation of the Remote Desktop Protocol. [CVSS 8.8 HIGH]

Technical ContextAI

Classified as CWE-787 (Out-of-bounds Write). Affects Freerdp. FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, in the RLE planar decode path, planar_decompress_plane_rle() writes into pDstData at ((nYDst+y) * nDstStep) + (4*nXDst) + nChannel without verifying that (nYDst+nSrcHeight) fits in the destination height or that (nXDst+nSrcWidth) fits in the destination stride. When TempFormat != DstFormat, pDstData becomes planar->pTempData (sized for the desktop), while nYDst is only validated against th

RemediationAI

A vendor patch is available — apply it immediately. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.

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Same weakness CWE-787 – Out-of-bounds Write

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Same technique Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 SUSE Linux Enterprise Workstation Extension 15 SP7 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7 Fixed
SUSE Linux Enterprise Server 12 SP5-LTSS Fixed

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CVE-2026-26965 vulnerability details – vuln.today
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