CVE-2026-110830 FreeRDP CVE debrief

Who should care

Defenders responsible for FreeRDP deployments should assess exposure and prioritize patching or mitigation to prevent potential denial-of-service attacks. This includes reviewing system configurations, monitoring for suspicious activity, and implementing compensating controls where necessary. Security teams should also track exceptions and retest remediated assets to ensure the vulnerability is properly addressed.

Why it matters

Defenders should prioritize patching or mitigating CVE-2026-110830 to prevent potential denial-of-service attacks against FreeRDP clients. This vulnerability allows a malicious RDP server to cause file descriptor exhaustion, leading to client termination. Defenders responsible for FreeRDP deployments should assess exposure and take action to prevent potential attacks.

• Denial of service via file descriptor exhaustion
• Potential client termination due to accumulated descriptors

Technical summary

FreeRDP before 3.32.0 fails to close prior serial handles in serial_process_irp_create, allowing a malicious RDP server to exhaust file descriptors. Attackers can send repeated serial IRP_MJ_CREATE requests to accumulate descriptors and terminate the client at the CommReadFile FD_SETSIZE assertion. This vulnerability can be mitigated by patching to version 3.32.0 or later. Defenders should prioritize patching or mitigating this vulnerability to prevent potential denial-of-service attacks. The vulnerability's technical details are based on the CVE record and source item.

Defensive priority

Defenders should prioritize patching or mitigating this vulnerability to prevent potential denial-of-service attacks.

Recommended defensive actions

• Patch FreeRDP to version 3.32.0 or later
• Implement network segmentation to limit exposure to untrusted RDP servers
• Monitor for suspicious RDP activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description and affected versions. Evidence is limited, and defenders should verify the vulnerability's impact on their systems. The CVE Program record and NVD detail page offer additional information on the vulnerability. However, the exact scope of affected systems and potential attack vectors may require further investigation.

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.