SB2026092914 - Red Hat Enterprise Linux 8 update for freerdp

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Main Vulnerability Database SB2026092914

SB2026092914 - Red Hat Enterprise Linux 8 update for freerdp

Published: September 29, 2026 Updated: October 1, 2026

Security Bulletin ID SB2026092914
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Heap-based buffer overflow (CVE-ID: CVE-2026-55193)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to heap-based buffer overflow in the TS Gateway RPC fragment receive logic when processing RESPONSE fragments from a TS Gateway after RPC bind negotiation. A remote attacker can send a crafted bind_ack and subsequent oversized RESPONSE fragments to execute arbitrary code.

The issue affects FreeRDP clients using TS Gateway / RD Gateway transport, and can also be triggered by an active machine-in-the-middle on gateway traffic. Direct RDP connections that do not use the gateway RPC layer are not affected.


Remediation

Install update from vendor's website.

References