EUVD-2026-20773
GHSA-wxrw-fvc7-2xmx
CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Description
MemProcFS before 5.17 contains multiple unsafe library-loading patterns that enable DLL and shared-library hijacking across six attack surfaces, including bare-name LoadLibraryU and dlopen calls without path qualification for vmmpyc, libMSCompression, and plugin DLLs. An attacker who places a malicious DLL or shared library in the working directory or manipulates LD_LIBRARY_PATH can achieve arbitrary code execution when MemProcFS loads.
Analysis
DLL and shared-library hijacking in ufrisk MemProcFS versions prior to 5.17 enables local arbitrary code execution through six distinct attack surfaces. Unsafe library-loading patterns-including unqualified LoadLibraryU and dlopen calls for vmmpyc, libMSCompression, and plugin DLLs-allow attackers to plant malicious libraries in the working directory or manipulate LD_LIBRARY_PATH. …
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Remediation
Within 24 hours: Identify all systems running ufrisk MemProcFS and document current versions. Within 7 days: Upgrade to MemProcFS 5.17 or later on all affected systems. …
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External POC / Exploit Code
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