CVE-2026-109250 FreeRDP CVE debrief

Who should care

System administrators and security teams responsible for FreeRDP installations should assess exposure and prioritize patching for FreeRDP 3.0.0 to 3.31.0 versions. This includes reviewing compensating controls, monitoring for potential exploitation attempts, and verifying inventory of FreeRDP installations. Security teams should also track exceptions, retest remediated assets, and close the item only after evidence is documented.

Why it matters

This vulnerability allows local attackers to potentially corrupt heap memory, requiring assessment and patching priority for FreeRDP 3.0.0 to 3.31.0 versions.

• Local attackers may write past the fixed 64-entry keys array during PKCS#11 key enumeration
• Attackers controlling smartcard tokens can corrupt heap memory with attacker-chosen CKA_ID and CKA_LABEL data during smartcard logon

Technical summary

A heap buffer overflow vulnerability exists in FreeRDP 3.0.0 before 3.32.0 in the collect_keys() function during PKCS#11 key enumeration. This vulnerability allows local attackers to write past the fixed 64-entry keys array, potentially corrupting heap memory with attacker-chosen CKA_ID and CKA_LABEL data during smartcard logon. The vulnerability requires assessment and patching priority for FreeRDP 3.0.0 to 3.31.0 versions to prevent local attacks. Defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Defensive priority

Assess exposure and prioritize patching for FreeRDP 3.0.0 to 3.31.0 versions.

Recommended defensive actions

• Assess exposure and prioritize patching for FreeRDP 3.0.0 to 3.31.0 versions
• Verify inventory of FreeRDP installations
• 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 heap buffer overflow vulnerability in FreeRDP 3.0.0 before 3.32.0. Evidence is based on CVE Program records and source item descriptions, with limitations on affected scope and severity. Defenders should verify FreeRDP installations, assess exposure, and prioritize patching for versions 3.0.0 to 3.31.0. Additional verification tasks include reviewing official advisories and tracking exceptions for remediated assets.

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.