Bug 2567633 (CVE-2026-121950)

Summary: CVE-2026-121950 freerdp: FreeRDP: Heap buffer overflow via integer overflow in surface creation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FreeRDP. A malicious Remote Desktop Protocol (RDP) server can cause a denial of service (DoS) or memory corruption on a connecting client. This issue occurs because FreeRDP does not properly validate graphical surface dimensions, resulting in an integer overflow during memory allocation calculations. By sending a specially crafted surface creation message, a rogue server can trigger excessive memory consumption or a heap-based buffer overflow, causing the client application to crash.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-05 22:13:40 UTC
FreeRDP before 3.32.2 does not check the product of surface dimensions in gdi_CreateSurface when handling an RDPGFX CREATE_SURFACE PDU, causing an integer wrap and heap buffer overflow on 32-bit builds and an approximately 4 GiB allocation on 64-bit builds. A malicious RDP server can send a CREATE_SURFACE PDU with width and height 32766 to a connecting client to corrupt heap memory or cause a denial of service.