Bug 2567941 (CVE-2026-121953) - CVE-2026-121953 freerdp: freerdp: Use-after-free via rdpgfx dynamic virtual channel close
Summary: CVE-2026-121953 freerdp: freerdp: Use-after-free via rdpgfx dynamic virtual c...
Keywords:
Status: NEW
Alias: CVE-2026-121953
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: 2568266 2568267
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-05 22:38 UTC by OSIDB Bzimport
Modified: 2026-11-06 15:10 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Last Closed:
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Description OSIDB Bzimport 2026-11-05 22:38:08 UTC 
FreeRDP before 3.32.2 has a use-after-free in the client's rdpgfx dynamic virtual channel: a duplicate-name channel with a new ChannelId overwrites the listener's single callback slot, which rdpgfx_on_close frees without clearing. A malicious RDP server can open and close such a channel, then send a PDU on the original channel to crash the client or potentially execute code.
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