CVE-2026-111375
Description
A flaw was found in FreeRDP. A malicious Remote Desktop Protocol (RDP) server can exploit this issue by sending a specially crafted Remote Applications Integrated Locally (RAIL) window title update that lacks proper null termination. When the Windows client processes the update, it reads past the allocated memory buffer, potentially leading to a Denial of Service (DoS) by crashing the client application or causing limited information disclosure.
Statement
A moderate out-of-bounds read vulnerability was found in FreeRDP, which is shipped as the freerdp component in Red Hat Enterprise Linux, Red Hat In-Vehicle OS, and Fedora/EPEL. A malicious or compromised Remote Desktop Protocol (RDP) server can send a specially crafted Remote Applications Integrated Locally (RAIL) window title update whose full-length UTF-16 title lacks NUL termination. The FreeRDP Windows RAIL client stores the exact-length buffer and passes its raw pointer to SetWindowTextW, an API that expects a NUL-terminated string, causing the client to read past the allocated heap buffer. The demonstrated consequences are a corrupted or failed RAIL window title update and a crash of the client application (denial of service); depending on heap layout, adjacent heap contents may also be partially disclosed through the window title. Exploitation requires an established RAIL/RemoteApp session with a malicious server and does not provide code execution. Red Hat rates this flaw Moderate (CVSS 3.1 score 4.8), consistent with the upstream severity. The fix is currently deferred for the affected Red Hat product streams, so updated packages are not presently planned; the residual risk is limited to client-side denial of service or minor information disclosure when a user connects to an untrusted RDP server.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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 | 4.8 | 9.1 | 4.8 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | High | Low | High |
| Privileges Required | None | None | None |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | Low | High | Low |
| Integrity Impact | None | None | None |
| Availability Impact | Low | High | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
An attacker could get secret values such as cryptographic keys, PII, memory addresses, or other information that could be used in additional attacks.
Confidentiality
Technical Impact: Bypass Protection Mechanism
Out-of-bounds memory could contain memory addresses or other information that can be used to bypass ASLR and other protection mechanisms in order to improve the reliability of exploiting a separate weakness for code execution.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker could cause a segmentation fault or crash by causing memory to be read outside of the bounds of the buffer. This is especially likely when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string.
Other
Technical Impact: Varies by Context
The read operation could produce other undefined or unexpected results.
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