Bug 2533904 (CVE-2026-91948) - CVE-2026-91948 FreeRDP: FreeRDP: Arbitrary code execution via oversized channel messages in SHOW_PROTOCOL
Summary: CVE-2026-91948 FreeRDP: FreeRDP: Arbitrary code execution via oversized chann...
Keywords:
Status: NEW
Alias: CVE-2026-91948
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:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-15 15:46 UTC by OSIDB Bzimport
Modified: 2026-09-15 17:19 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-09-15 15:46:45 UTC 
FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in server-side static virtual channel handling when CHANNEL_OPTION_SHOW_PROTOCOL is enabled. Authenticated clients can queue oversized channel messages that cause buffer underflow and corrupt heap memory including live pointers, potentially enabling code execution.
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