ufrisk MemProcFS up to 5.16/5.16.12 Dlopen Call LD_LIBRARY_PATH uncontrolled search path

Summaryinfo

A vulnerability categorized as problematic has been discovered in ufrisk MemProcFS up to 5.16/5.16.12. The impacted element is an unknown function of the component Dlopen Call Handler. Such manipulation of the argument LD_LIBRARY_PATH leads to uncontrolled search path. This vulnerability is uniquely identified as CVE-2026-40031. Local access is required to approach this attack. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in ufrisk MemProcFS up to 5.16/5.16.12. It has been rated as critical. Affected by this issue is an unknown functionality of the component Dlopen Call Handler. The manipulation of the argument LD_LIBRARY_PATH with an unknown input leads to a uncontrolled search path vulnerability. Using CWE to declare the problem leads to CWE-427. The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed with Mobasi Security Team. The advisory is available at github.com. This vulnerability is handled as CVE-2026-40031 since 04/08/2026. The exploitation is known to be difficult. Local access is required to approach this attack. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1574 by the MITRE ATT&CK project.

Upgrading to version 5.17 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch df80e6e83641f5004025ce661e6dd8139028d7b5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• ufrisk

Name

• MemProcFS

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10
• 5.11
• 5.12
• 5.13
• 5.14
• 5.15
• 5.16
• 5.16.0
• 5.16.1
• 5.16.2
• 5.16.3
• 5.16.4
• 5.16.5
• 5.16.6
• 5.16.7
• 5.16.8
• 5.16.9
• 5.16.10
• 5.16.11
• 5.16.12

License

• open-source

Website

• Product: https://github.com/ufrisk/MemProcFS/

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