Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version V3.1 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant).
These GNU/Linux vulnerabilities have been externally identified. Siemens is preparing fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.
Note: This SSA advises vulnerabilities for firmware version V3.1 only; for versions < V3.1 refer to Siemens Security Bulletin SSB-439005 (https://cert-portal.siemens.com/productcert/html/ssb-439005.html).

https://cert-portal.siemens.com/productcert/html/ssa-398330.html