FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, freerdp_image_copy_from_icon_data in libfreerdp/codec/color.c calculates nWidth multiplied by nHeight multiplied by FreeRDPGetBytesPerPixel(format) in 32-bit arithmetic. A malicious RDP server can send a RAIL TS_ICON_INFO update with dimensions such as 32768 by 32768 and 32 bits per pixel so the required-size calculation wraps, bypassing the cbBitsColor source bounds check before freerdp_image_copy_no_overlap reads attacker-controlled icon data. This affects RemoteApp clients using the vulnerable library path, while xfreerdp has a caller-side mitigation. This issue is fixed in version 3.27.0.
CVSS Details
- CVSS 4.0 Base Score: 6.1 (MEDIUM)
- CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade freerdp | Aug 20, 2026 | Aug 19, 2026 |
| Amazon Linux Ami 2 | — | Upgrade freerdp-debuginfoUpgrade libwinpr-develUpgrade freerdp-develUpgrade freerdp-libsUpgrade libwinprUpgrade freerdp | Aug 5, 2026 | Aug 5, 2026 |
| Redhat_linux | — | No solution exists | Aug 26, 2026 | Aug 19, 2026 |
| Ubuntu | — | Upgrade freerdp3-x11Upgrade freerdp-x11Upgrade libfreerdp3-3 | Jul 21, 2026 | Jul 20, 2026 |
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