FreeRDP up to 3.27.x GFX Pipeline planar.c planar_decompress_plane_rle_only buffer overflow

Summaryinfo

A vulnerability identified as critical has been detected in FreeRDP up to 3.27.x. This impacts the function planar_decompress_plane_rle_only of the file libfreerdp/codec/planar.c of the component GFX Pipeline. This manipulation causes buffer overflow. This vulnerability is tracked as CVE-2026-57158. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in FreeRDP up to 3.27.x and classified as critical. Affected by this vulnerability is the function planar_decompress_plane_rle_only of the file libfreerdp/codec/planar.c of the component GFX Pipeline. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

FreeRDP is a free implementation of the Remote Desktop Protocol. From 3.21.0 before 3.28.0, FreeRDP clients using the GFX pipeline contain an incomplete fix for CVE-2026-23530 in planar_decompress_plane_rle_only in libfreerdp/codec/planar.c, allowing a malicious RDP server to send a truncated RDPGFX_CMDID_WIRETOSURFACE_1 planar payload that reads one byte past the input buffer. This issue is fixed in version 3.28.0.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-57158 since 06/24/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 3.28.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Remote Access Software

Name

• FreeRDP

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27

License

• open-source

Website

• Product: https://github.com/FreeRDP/FreeRDP/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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