CVE-2026-91947

HIGH 7.5

FreeRDP Server before 3.31.0 Use-After-Free via DRDYNVC

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-362
Vendor	freerdp
Product	freerdp
Published	Sep 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

FreeRDP / FreeRDP

2.0.0 < 3.31.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 sam4k