CVE-2025-21887

A use after free vulnerability exists in the linux kernel such that dput(upper) is being called before ovl_dentry_update_reval(), while upper->d_flags was still accessed in ovl_dentry_remote().

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.