Bug 2483471 (CVE-2026-44421) - CVE-2026-44421 freerdp: FreeRDP: Arbitrary code execution via crafted RDPGFX PDUs
Summary: CVE-2026-44421 freerdp: FreeRDP: Arbitrary code execution via crafted RDPGFX ...
Keywords:
Status: NEW
Alias: CVE-2026-44421
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: 2491674 2491675 2491677
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-29 21:01 UTC by OSIDB Bzimport
Modified: 2026-07-07 13:53 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 13:53:22 UTC

Description OSIDB Bzimport 2026-05-29 21:01:47 UTC 
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, a malicious RDP server can trigger a heap-buffer-overflow write in the FreeRDP client by sending crafted RDPGFX PDUs. The bug is in gdi_CacheToSurface: it validates a destination rectangle that is clamped to UINT16_MAX, but then performs the copy using the original cacheEntry->width/height. This can cause a large out-of-bounds heap write and may lead to client crashes or code execution. This bug is reachable from a malicious RDP server, but only when the client has RDPGFX enabled. This vulnerability is fixed in 3.26.0.
Comment 3 errata-xmlrpc 2026-07-07 13:53:21 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
Note You need to log in before you can comment on or make changes to this bug.