# CVE-2023-0386: Linux Kernel Improper Ownership Management Vulnerability

> CVE-2023-0386: Linux Kernel Improper Ownership Management Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2023-0386
Last updated: 2025-10-21T23:15:22Z

- Published: 2023-03-22 00:00 UTC · Updated: 2025-10-21 23:15 UTC · Assigner: redhat
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 7.9%, 95th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-06-17, federal due date 2025-07-08, ransomware use: Unknown
- CWE: CWE-282

## Description

A flaw was found in the Linux kernel, 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.

## CISA 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.

## Affected vendors and products

- n/a: Kernel

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-0386)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2023-0386)
- [http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html](http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html)
- [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a)
- [https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html](https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html)
- [https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html](https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html)
- [https://security.netapp.com/advisory/ntap-20230420-0004/](https://security.netapp.com/advisory/ntap-20230420-0004/)
- [https://www.debian.org/security/2023/dsa-5402](https://www.debian.org/security/2023/dsa-5402)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2023-0386 · Markdown: https://rewindex.com/cve/CVE-2023-0386.md · JSON: https://rewindex.com/api/v1/cves/CVE-2023-0386 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:04:02.915Z