CVE-2026-111380
Received Received - Intake

Integer Overflow in FreeRDP Apple Audin Backend

Publication date: 2026-10-16

Last updated on: 2026-10-16

Assigner: VulnCheck

Description
FreeRDP from 3.29.0 before 3.32.0 contains an integer overflow in the Apple audin backends (audin_mac.m, audin_ios.m), which compute the audio queue buffer size as FramesPerPacket * 2 * nChannels in UINT32 arithmetic, bypassing the CVE-2026-91962 fix. A malicious RDP server can send FramesPerPacket of 2^30 in the audin Open PDU to wrap the multiplication, causing undersized AudioQueueAllocateBuffer allocations and a heap out-of-bounds write in macOS and iOS clients.

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Meta Information

Published
2026-10-16
Last Modified
2026-10-16
Generated
2026-10-16
AI Q&A
2026-10-16
EPSS Evaluated
N/A
NVD
CVE-2026-111380
EUVD
EUVD-2026-102561

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
FreeRDP FreeRDP 3.29.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

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Executive Summary

This vulnerability is a heap overflow in FreeRDP versions 3.29.0 to 3.31.0 affecting Apple audin backends. It occurs due to an integer overflow when calculating audio buffer size using UINT32 arithmetic. A malicious RDP server sends a specific FramesPerPacket value (2^30) to cause the calculation to wrap around, resulting in an undersized buffer and a heap out-of-bounds write in macOS and iOS clients.

Detection Guidance

To detect this vulnerability, check the FreeRDP version on your system. Affected versions are 3.29.0 through 3.31.0. Run: freerdp2 --version or apt list --installed | grep freerdp2 on Debian-based systems. If the version is within the affected range, the system is vulnerable.

Impact Analysis

This vulnerability can allow a malicious RDP server to crash the FreeRDP client or potentially execute arbitrary code on the client machine. It specifically affects macOS and iOS users running vulnerable FreeRDP versions when connecting to a compromised server.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by enabling unauthorized code execution or data exfiltration on affected macOS and iOS clients. A successful exploit may allow attackers to bypass security controls, access sensitive data, or execute arbitrary code, which could violate data protection requirements under these regulations.

Mitigation Strategies

Upgrade FreeRDP to version 3.32.0 or later immediately. This patch resolves the integer overflow issue in the Apple audin backends. Alternatively, avoid connecting to untrusted RDP servers until the update is applied.

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