Linux Kernel Improper Ownership Management Vulnerability
n/a — Kernel
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.
7.8
7.9%
Vector breakdown
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- Mar 22, 2023
- Modified
- Jun 17, 2026
- Added to KEV
- Jun 17, 2025
- Federal patch due
- Jul 8, 2025
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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
8 foundWeaponization
Public repositories whose name or description references CVE-2023-0386, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- xkaneiki/CVE-2023-0386★ 416
CVE-2023-0386在ubuntu22.04上的提权
updated Oct 12, 2026
- chenaotian/CVE-2023-0386★ 123
CVE-2023-0386 analysis and Exp
updated Sep 15, 2026
- sxlmnwb/CVE-2023-0386★ 56
Vulnerabilities Exploitation On Ubuntu 22.04
updated Oct 9, 2026
- puckiestyle/CVE-2023-0386★ 22
updated Sep 19, 2026
- Fanxiaoyao66/CVE-2023-0386★ 21
非常简单的CVE-2023-0386's exp and analysis.Use c and sh.
updated Sep 15, 2026
- veritas501/CVE-2023-0386★ 10
updated Jun 7, 2024
- P4x1s/CVE-2023-0386★ 4
CVE-2023-0386 EXP
updated Mar 10, 2025
- Satheesh575555/linux-4.19.72_CVE-2023-0386★ 4
updated Jun 1, 2023
References
Frequently asked questions
What is CVE-2023-0386?
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.
How severe is CVE-2023-0386?
CVE-2023-0386 has a CVSS base score of 7.8 out of 10 (CVSS 3.1).
Is CVE-2023-0386 actively exploited in the wild?
Yes. CVE-2023-0386 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jun 17, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2023-0386?
7.9% - meaning FIRST.org's EPSS model estimates a 7.9% probability this vulnerability will be exploited in the wild within 30 days (94% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2023-0386?
We found 8 public GitHub repositories referencing CVE-2023-0386, though none matched a known Nuclei template or Metasploit module at last check. Review each one before relying on it - see the proof-of-concept section above.
What type of vulnerability is CVE-2023-0386?
CVE-2023-0386 is classified under CWE-282.
Cross-checked against
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