FreeRDP up to 3.32.0 Clipboard winpr_read_png_from_buffer out-of-bounds

Summaryinfo

A vulnerability marked as problematic has been reported in FreeRDP. Affected by this issue is the function winpr_read_png_from_buffer of the component Clipboard. The manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2026-114043. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in FreeRDP. This issue affects the function winpr_read_png_from_buffer of the component Clipboard. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality. The summary by CVE is:

FreeRDP before 3.32.1 contains a heap-based out-of-bounds read in WinPR's clipboard PNG-to-CF_DIB synthesis because winpr_read_png_from_buffer() allocates a bit-packed buffer for PNGs with bit depth below 8, while winpr_bitmap_write_buffer() copies rows assuming one byte per pixel. A malicious RDP server can send a crafted low-bit-depth PNG clipboard payload that, when pasted by the victim, discloses megabytes of heap memory.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-114043 since 10/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 3.32.1 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Remote Access Software

Name

• FreeRDP

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.1.0-beta+2013071101
• 1.1.0-beta1
• 2.0.0
• 2.0.0-beta1
• 2.0.0-beta1+android11
• 2.0.0-rc4
• 2.1.0
• 2.1.1
• 2.1.2
• 2.2.0
• 2.3.0
• 2.4.0
• 2.4.1
• 2.7.0
• 2.8.1
• 2.9.0
• 2.11.0
• 2.11.5
• 2.11.6
• 2.11.8
• 3.0.0
• 3.0.0-beta2
• 3.0.0-beta3
• 3.1
• 3.2.0
• 3.4
• 3.5.0
• 3.5.1
• 3.9.0
• 3.20.0
• 3.20.1
• 3.21.0
• 3.22
• 3.22.0
• 3.23.0
• 3.24.0
• 3.24.2
• 3.25.0
• 3.26.0
• 3.27
• 3.27.0
• 3.27.1
• 3.28.0
• 3.29.0
• 3.30.0
• 3.31
• 3.31.0
• 3.32.0

License

• open-source

Website

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

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