PT-2026-31468 · Ufrisk+1 · Memprocfs

CVE-2026-40031 · Published 2026-04-08 · Updated 2026-04-08

Positive Technologies (AI Summary)

CVSS v4.0

8.5

High

Base vector

AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions MemProcFS versions prior to 5.17

Description Unsafe library-loading patterns across six attack surfaces allow for DLL and shared-library hijacking. This occurs due to the use of bare-name LoadLibraryU and dlopen calls without path qualification for vmmpyc, libMSCompression, and plugin DLLs. An attacker can achieve arbitrary code execution by placing a malicious library in the working directory or by manipulating the LD LIBRARY PATH environment variable.

Recommendations Update MemProcFS to version 5.17 or later.

Exploit

Fix

Uncontrolled Search Path Element

Weakness Enumeration

CWE-427

Related Identifiers

CVE-2026-40031

Affected Products

Memprocfs

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40031.json · Exploit
• https://github.com/ufrisk/MemProcFS/commit/df80e6e83641f5004025ce661e6dd8139028d7b5 · Patch
• https://mobasi.ai/sentinel · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40031 · Security Note
• https://osv.dev/vulnerability/CVE-2026-40031 · Vendor Advisory
• https://github.com/ufrisk/MemProcFS/releases/tag/v5.17 · Note
• https://vulncheck.com/advisories/memprocfs-dll-shared-library-hijacking · Note