CVE-2026-23884CRITICAL 9.8EPSS p41.0%

CVE-2026-23884CVE-2026-23884

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, offscreen bitmap deletion leaves `gdi->drawing` pointing to freed memory, causing UAF when related update packets arrive. A malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.54% probability of exploitation · percentile 41.0% · 2026-06-18T12:00:27Z
Published2026-01-19
Last modified2026-01-28

Underlying weaknesses· 1

CWE-416

References

  1. https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/offscreen.c#L114-L122
  2. https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/offscreen.c#L87-L91
  3. https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0
  4. https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cfgj-vc84-f3pp

1

TypeTargetConfidenceTier
WeaknessUse After Freecwe-4160%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-23883
CVE
CVE-2026-23532
CVE
CVE-2026-25955
CVE
CVE-2026-23531
CVE
CVE-2026-23533
CVE
CVE-2026-33982
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.