Vulnerability in Ufrisk Memprocfs
CVE-2026-40031
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Ufrisk Memprocfs — versions df80e6e83641f5004025ce661e6dd8139028d7b5, 5.17.0, 5.17
Weakness classification (CWE)
References
- github.com/ufrisk/MemProcFS/releases/tag/v5.17 (Product, product)
- github.com/ufrisk/MemProcFS/commit/df80e6e83641f5004025ce661e6dd8139028d7b5 (Patch, patch)
- mobasi.ai/sentinel (vendor-advisory, Third Party Advisory)
- www.vulncheck.com/advisories/memprocfs-dll-shared-library-hijacking (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-40031?
- CVE-2026-40031 is a high-severity vulnerability in Ufrisk Memprocfs, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-04-08.
- How severe is CVE-2026-40031?
- High severity. CVSS v3 base score is 7.8 out of 10.