ClosedHighPatched

Linux Kernel: Kernel Improper Ownership Management Vulnerability

Linux Kernel

Linux Kernel contains an improper ownership management vulnerability, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system. Added to CISA KEV on 2025-06-17.

Why this severity: CVSS 7.8 (CISA ADP, v3.1); actively exploited (CISA KEV)

Started: Jun 17, 2025
Closed: Jun 17, 2025
CVE: CVE-2023-0386

Updated Jun 17, 2025

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Jun 17, 2025
CISA added CVE-2023-0386 to the KEV catalog (due 2025-07-08).

Advisories5

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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