CVE-2026-91947CWE-362

CVE-2026-91947

High · published September 15, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
22.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
7.7 · CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00308 · 22.4th percentile
Weakness
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Published
2026-09-15T20:17Z
References (2)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6mpx-c8rj-whj5 · [email protected]https://www.vulncheck.com/advisories/freerdp-server-before-3.31.0-use-after-free-via-drdynvc · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 15:18Z
    FreeRDP Server before 3.31.0 Use-After-Free via DRDYNVC
    cvelistv5