CVE-2026-22856HIGH 8.1EPSS p20.1%

CVE-2026-22856CVE-2026-22856

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race in the serial channel IRP thread tracking allows a heap use‑after‑free when one thread removes an entry from serial->IrpThreads while another reads it. This vulnerability is fixed in 3.20.1.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.29% probability of exploitation · percentile 20.1% · 2026-06-19T12:03:05Z
Published2026-01-14
Last modified2026-01-20

Underlying weaknesses· 2

CWE-362CWE-416

References

  1. https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
  2. https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhv

2

TypeTargetConfidenceTier
WeaknessConcurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')cwe-3620%live
WeaknessUse After Freecwe-4160%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.