CVE-2026-91947

Description

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.

CVSS Vector

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6mpx-c8rj-whj5
• https://www.vulncheck.com/advisories/freerdp-server-before-3.31.0-use-after-free-via-drdynvc