Bug 2519824 (CVE-2026-55194) - CVE-2026-55194 FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response
Summary: CVE-2026-55194 FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code e...
Keywords:
Status: NEW
Alias: CVE-2026-55194
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-19 18:08 UTC by OSIDB Bzimport
Modified: 2026-10-02 13:09 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:61378 0 None None None 2026-08-31 12:41:35 UTC
Red Hat Product Errata RHSA-2026:61379 0 None None None 2026-08-31 12:31:50 UTC
Red Hat Product Errata RHSA-2026:62571 0 None None None 2026-09-02 11:06:47 UTC
Red Hat Product Errata RHSA-2026:65855 0 None None None 2026-09-09 08:35:25 UTC
Red Hat Product Errata RHSA-2026:66281 0 None None None 2026-09-10 01:23:43 UTC
Red Hat Product Errata RHSA-2026:66282 0 None None None 2026-09-10 01:27:21 UTC
Red Hat Product Errata RHSA-2026:68706 0 None None None 2026-09-17 17:54:52 UTC
Red Hat Product Errata RHSA-2026:68707 0 None None None 2026-09-17 18:37:59 UTC
Red Hat Product Errata RHSA-2026:71387 0 None None None 2026-09-24 08:58:55 UTC
Red Hat Product Errata RHSA-2026:71388 0 None None None 2026-09-24 06:23:10 UTC
Red Hat Product Errata RHSA-2026:71390 0 None None None 2026-09-24 06:43:10 UTC

Description OSIDB Bzimport 2026-08-19 18:08:31 UTC 
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.
Comment 2 errata-xmlrpc 2026-08-31 12:31:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:61379 https://access.redhat.com/errata/RHSA-2026:61379
Comment 3 errata-xmlrpc 2026-08-31 12:41:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:61378 https://access.redhat.com/errata/RHSA-2026:61378
Comment 4 errata-xmlrpc 2026-09-02 11:06:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:62571 https://access.redhat.com/errata/RHSA-2026:62571
Comment 5 errata-xmlrpc 2026-09-09 08:35:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:65855 https://access.redhat.com/errata/RHSA-2026:65855
Comment 6 errata-xmlrpc 2026-09-10 01:23:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:66281 https://access.redhat.com/errata/RHSA-2026:66281
Comment 7 errata-xmlrpc 2026-09-10 01:27:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:66282 https://access.redhat.com/errata/RHSA-2026:66282
Comment 8 Jon Orris 2026-09-17 17:54:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:68706 https://access.redhat.com/errata/RHSA-2026:68706
Comment 9 Jon Orris 2026-09-17 18:37:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:68707 https://access.redhat.com/errata/RHSA-2026:68707
Comment 10 Jon Orris 2026-09-24 06:23:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:71388 https://access.redhat.com/errata/RHSA-2026:71388
Comment 11 Jon Orris 2026-09-24 06:43:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:71390 https://access.redhat.com/errata/RHSA-2026:71390
Comment 12 Jon Orris 2026-09-24 08:58:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:71387 https://access.redhat.com/errata/RHSA-2026:71387
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