What is CVE-2025-21887?

CVE-2025-21887 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up

Which CVE IDs does CVE-2025-21887 cover?

CVE-2025-21887 covers the following CVE IDs: CVE-2025-21887. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-21887?

CVE-2025-21887 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

CVE-2025-21887HighCVSS 7.8

ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up

Vendor

Microsoft Security Response Center (MSRC)

Published

July 11, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-21887 →