CVE-2026-110829 FreeRDP CVE debrief

Who should care

Defenders responsible for managing FreeRDP installations should assess exposure and prioritize patching to prevent potential denial-of-service attacks. This includes reviewing and updating vulnerability management processes to ensure timely patching, monitoring for potential exploitation attempts, and tracking exceptions and remediated assets. Additionally, defenders should review compensating controls for exposed systems while remediation is scheduled and

Why it matters

Defenders should prioritize verifying FreeRDP versions and applying patches to prevent potential denial-of-service attacks. This vulnerability can be exploited by a malicious RDP server to crash the client.

• Denial-of-service attacks via malicious RDP servers
• Potential client crashes due to null pointer dereference

Technical summary

FreeRDP versions from 3.0.0 before 3.32.0 contain a null pointer dereference in the rdpsnd channel when a fragment sets CHANNEL_FLAG_LAST without CHANNEL_FLAG_FIRST. A malicious RDP server can send a malformed rdpsnd PDU on a fresh channel to crash the client and cause denial of service. The vulnerability affects FreeRDP installations, and defenders should prioritize verifying FreeRDP versions and applying patches to prevent potential attacks. The CVE record provides additional context on the vulnerability, and defenders should review the official CVE record and source item for more information.

Defensive priority

Defenders should prioritize verifying FreeRDP versions and applying patches to prevent potential denial-of-service attacks.

Recommended defensive actions

• Verify FreeRDP versions and apply patches to prevent potential denial-of-service attacks
• Review and update vulnerability management processes to ensure timely patching
• Monitor for potential exploitation attempts
• 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 a null pointer dereference vulnerability in FreeRDP versions from 3.0.0 before 3.32.0. The vulnerability is caused by a fragment setting CHANNEL_FLAG_LAST without CHANNEL_FLAG_FIRST in the rdpsnd channel. A malicious RDP server can send a malformed rdpsnd PDU on a fresh channel to crash the client and cause denial of service. The source item provides additional context on the vulnerability, and defenders should review the official CVE record and source item for more information.

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.