June 17, 2025 · Applied Cybernetics Group
CVE-2023-0386 — Linux Kernel
Linux Kernel Improper Ownership Management Vulnerability
- Added to KEV
2025-06-17- Federal due date
2025-07-08- Vendor
- Linux
- Product
- Kernel
- EPSS
- 97.8th percentile (score 0.485, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2023-0386
CISA short description
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.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.