CVE-2025-39964

Radar advisories

• 2026-10-22 CISA Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP The advisory notes 428 vulnerabilities in the GNU/Linux subsystem of firmware version ≥ 3.1.7 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP.
• 2026-09-18 CISA CISA KEV — Linux Kernel (CVE-2025-39964) +1 more CISA added CVE-2025-39964 and CVE-2026-53266, both Linux kernel flaws, to the KEV Catalog due to active exploitation.

Named alongside

• CVE-2021-41617
• CVE-2023-28531
• CVE-2023-51384
• CVE-2023-52927
• CVE-2023-53292
• CVE-2024-26783
• CVE-2024-27056
• CVE-2024-28956
• CVE-2024-36903
• CVE-2024-36927

References

• NVD ↗
• CVE.org ↗
• CISA KEV catalogue ↗ listed as known exploited