CVE-2026-55648
Description
A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. An integer overflow vulnerability in the freerdp_image_copy_from_icon_data function allows a malicious Remote Desktop Protocol (RDP) server to bypass a bounds check. By sending a specially crafted icon update with large dimensions, the server can cause the client to read attacker-controlled data beyond the intended memory buffer. This out-of-bounds read can lead to information disclosure or potentially arbitrary code execution on affected RemoteApp clients.
Mitigation
The vulnerability requires a client to connect to a malicious RDP server. To mitigate this risk, users should avoid connecting to untrusted or unknown RDP servers. Restricting network access to only known and trusted RDP servers can also reduce the attack surface.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.3 | 7.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | Required | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | Low | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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