What is CVE-2025-21856?

CVE-2025-21856 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. s390/ism: add release function for struct device

Which CVE IDs does CVE-2025-21856 cover?

CVE-2025-21856 covers the following CVE IDs: CVE-2025-21856. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-21856?

CVE-2025-21856 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

CVE-2025-21856HighCVSS 7.8

s390/ism: add release function for struct device

Vendor

Microsoft Security Response Center (MSRC)

Published

July 11, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-21856 →