What is CVE-2025-21863?

CVE-2025-21863 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. io_uring: prevent opcode speculation

Which CVE IDs does CVE-2025-21863 cover?

CVE-2025-21863 covers the following CVE IDs: CVE-2025-21863. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-21863?

CVE-2025-21863 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

CVE-2025-21863MediumCVSS 7.8

io_uring: prevent opcode speculation

Vendor

Microsoft Security Response Center (MSRC)

Published

July 11, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-21863 →