VDB
CVE-2026-55648
CVE-2026-55648
PUBLISHED
CVSS 6.1 MEDIUM
Reported by GitHub_M · Published August 19, 2026
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.
Risk Scores
CVSS 4.0
6.1
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| FreeRDP | FreeRDP | < 3.27.0 |
| FreeRDP | FreeRDP | < 3.27.0, < 3.27.0 |
| alpine | freerdp | 0, 0, 0 |
Timeline
- Jun 19, 2026 CVE Published
- Aug 24, 2026 EPSS Score
- Aug 26, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 3, 2026 EPSS Score
- Sep 4, 2026 Security Advisory
- Sep 6, 2026 EPSS Score
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5c5v-f78v-h2f6 x_refsource_CONFIRM
- https://github.com/FreeRDP/FreeRDP/pull/12877 x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/commit/e4ae473da2926724d9b6329778797a3bdea79eb3 x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0 x_refsource_MISC