CVE-2026-110837 FreeRDP CVE debrief

Who should care

Defenders responsible for FreeRDP deployments should assess exposure and prioritize verification and remediation. This includes IT personnel, security teams, and system administrators who manage FreeRDP-based systems. They should verify FreeRDP versions, assess exposure, and prioritize remediation to prevent potential exploitation of this vulnerability.

Why it matters

Defenders should care about CVE-2026-110837 because it allows a malicious RDP server to crash the client, and they should verify FreeRDP versions, assess exposure, and prioritize remediation.

• Client crashes due to buffer overflow
• Potential for malicious RDP servers to exploit vulnerability
• Need for verification of FreeRDP versions and exposure
• Prioritization of remediation and compensating controls

Technical summary

FreeRDP 2.0.0 before 3.32.0, when built with WITH_LAME=ON and WITH_DSP_FFMPEG=OFF, has a heap-based buffer overflow in freerdp_dsp_decode_mp3 because the right-channel PCM pointer is offset by a byte count treated as short elements. This vulnerability could allow a malicious RDP server to crash the client by sending MP3 audio over rdpsnd, causing decoded samples to cross the heap allocation. Defenders should prioritize verifying FreeRDP versions and assessing exposure to this vulnerability, as it could have significant impacts on the security of affected systems.

Defensive priority

Defenders should prioritize verifying FreeRDP versions and assessing exposure, as a malicious RDP server can exploit this vulnerability to crash the client.

Recommended defensive actions

• Verify FreeRDP versions and assess exposure
• Implement compensating controls to detect and prevent exploitation
• Monitor for suspicious RDP activity
• Update to version 3.32.0 or later
• Review and prioritize patching of affected systems
• Conduct vulnerability scanning to identify potential targets
• Engage with the FreeRDP community for additional guidance and support

Evidence notes

The CVE record and source item provide details on the heap-based buffer overflow vulnerability in FreeRDP 2.0.0 before 3.32.0. The vulnerability is caused by the right-channel PCM pointer being offset by a byte count treated as short elements. The CVE record was published on 2026-10-14T22:52:12.464Z and has not been modified since then. The source item provides additional context on the vulnerability, including its impact on FreeRDP deployments.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.