High [CVE-2026-68580] Remote code execution or denial of service via audio input integer overflow

FreeRDP before 3.29.0 contains integer overflow vulnerabilities in the audio input redirection channel (audin) across ALSA, sndio, WinMM, and OpenSL ES backends that fail to validate the FramesPerPacket parameter from RDP servers.

Attackers can supply a malicious FramesPerPacket value causing allocation size wraparound, resulting in heap-based buffer overflow on ALSA or denial of service on all platforms. A flaw was found in FreeRDP, an open-source implementation of the Remote Desktop Protocol (RDP).

This can lead to a heap-based buffer overflow, potentially enabling arbitrary code execution on systems using the ALSA backend, or a denial of service across all supported platforms.

The vulnerability arises from an integer overflow in the audio input redirection channel (audin) when connecting to a malicious RDP server, which can cause a heap-based buffer overflow, particularly affecting Linux systems using the ALSA backend. Exploitation requires user interaction to connect to a compromised server.

Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-190.