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CVE-2026-91947

FreeRDP Server before 3.31.0 Use-After-Free via DRDYNVC

CVSS 4.0 7.7 HIGHCVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-91947

Published

FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-91947

Published

FreeRDP

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "FreeRDP",
                    "product": "FreeRDP",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "versionType": "semver",
                            "version": "2.0.0",
                            "lessThan": "3.31.0",
                            "status": "affected"
                        },
                        {
                            "versionType": "semver",
                            "version": "3.31.0",
                            "status": "unaffected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON