Bug 2499159 (CVE-2026-55827) - CVE-2026-55827 FreeRDP: FreeRDP: Remote code execution via heap out-of-bounds write in RemoteFX decoding
Summary: CVE-2026-55827 FreeRDP: FreeRDP: Remote code execution via heap out-of-bounds...
Keywords:
Status: NEW
Alias: CVE-2026-55827
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: 2499223 2499224 2499227
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-10 20:01 UTC by OSIDB Bzimport
Modified: 2026-08-13 18:11 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-2026:50747 0 None None None 2026-08-05 09:49:28 UTC
Red Hat Product Errata RHSA-2026:54667 0 None None None 2026-08-13 18:11:31 UTC

Description OSIDB Bzimport 2026-07-10 20:01:59 UTC 
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.1, FreeRDP clients launched with the non-default /cache:codec:rfx option pass desktop stride and height to RemoteFX decoding for Cache Bitmap V3 data while allocating bitmap->data only for the smaller DstWidth and DstHeight in gdi_Bitmap_Decompress, allowing a malicious RDP server to trigger a heap out-of-bounds write with attacker-controlled offset and content. This issue is fixed in version 3.27.1.
Comment 1 errata-xmlrpc 2026-08-05 09:49:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:50747 https://access.redhat.com/errata/RHSA-2026:50747
Comment 2 errata-xmlrpc 2026-08-13 18:11:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:54667 https://access.redhat.com/errata/RHSA-2026:54667
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