CVE-2026-40031CWE-427

MemProcFS < 5.17 DLL/Shared Library Hijacking

High · published April 8, 2026

CVSS v4.0
8.5
EPSS
0%
Percentile
10.2
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v4.0
8.5 · HIGH
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
EPSS
0.00206 · 10.2th percentile
Weakness
CWE-427 · Uncontrolled Search Path Element
Published
2026-04-08T21:35Z
EPSS history
Timeline
  • 08 APR 21:35Z
    MemProcFS < 5.17 DLL/Shared Library Hijacking
    cvelistv5