Heap-based Buffer Overflow Affecting libwinpr package, versions <2:3.10.3-12.el10_2.10


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.62% (48th percentile)

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  • Snyk IDSNYK-ROCKY10-LIBWINPR-19496475
  • published2 Sept 2026
  • disclosed19 Aug 2026

Introduced: 19 Aug 2026

CVE-2026-55194  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:10 libwinpr to version 2:3.10.3-12.el10_2.10 or higher.
This issue was patched in RLSA-2026:61378.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libwinpr package and not the libwinpr package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:10 relevant fixed versions and status.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0.

CVSS Base Scores

version 3.1