Heap-based Buffer Overflow Affecting freerdp package, versions <2:2.11.7-1.el9_7.1


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.1% (29th percentile)

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  • Snyk IDSNYK-ROCKY9-FREERDP-15248237
  • published8 Feb 2026
  • disclosed19 Jan 2026

Introduced: 19 Jan 2026

NewCVE-2026-23534  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 freerdp to version 2:2.11.7-1.el9_7.1 or higher.
This issue was patched in RLSA-2026:2048.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp package and not the freerdp package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the ClearCodec bands decode path when crafted band coordinates allow writes past the end of the destination surface buffer. A malicious server can trigger a client‑side heap buffer overflow, 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.

CVSS Base Scores

version 3.1