Bug 2483470 (CVE-2026-45700) - CVE-2026-45700 freerdp: FreeRDP: Out-of-bounds write in planar bitmap decoder allows arbitrary code execution
Summary: CVE-2026-45700 freerdp: FreeRDP: Out-of-bounds write in planar bitmap decoder...
Keywords:
Status: NEW
Alias: CVE-2026-45700
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2491683 2491684 2491685
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-29 21:01 UTC by OSIDB Bzimport
Modified: 2026-07-09 09:34 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-2026:36203 0 None None None 2026-07-07 13:53:21 UTC
Red Hat Product Errata RHSA-2026:37207 0 None None None 2026-07-09 09:34:21 UTC

Description OSIDB Bzimport 2026-05-29 21:01:43 UTC 
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's planar bitmap decoder has an out-of-bounds heap write when decoding RLE planar data. In libfreerdp/codec/planar.c, freerdp_bitmap_decompress_planar() validates the X destination coordinate nXDst against the caller-provided destination stride (nDstStep) even when it is writing into the internal temp buffer pTempData. An attacker can bypass the check with a large nDstStep and a large nXDst, causing planar_decompress_plane_rle() to write past the end of pTempData. This vulnerability is fixed in 3.26.0.
Comment 3 errata-xmlrpc 2026-07-07 13:53:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:36203 https://access.redhat.com/errata/RHSA-2026:36203
Comment 4 errata-xmlrpc 2026-07-09 09:34:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:37207 https://access.redhat.com/errata/RHSA-2026:37207
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