Is CVE-2023-0386 actively exploited?

Yes. CVE-2023-0386 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2023-0386 be exploited remotely?

The attack vector of CVE-2023-0386 has not been classified yet.

What is the CVSS score of CVE-2023-0386?

CVE-2023-0386 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2023-0386

HIGHCISA KEVIN THE WILD

CVE-2023-0386

Published: June 17, 2025

EPSS:61.56%probability of exploitation in 30 daysPercentile:98.3th

Official 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.

NVD Source

CISA KEV Advisory

Linux Kernel Improper Ownership Management Vulnerability

Added to KEV: 2025-06-17Federal patch deadline: 2025-07-08

Required Action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Risk Analysis

A flaw in the Linux kernel's OverlayFS subsystem allows a local user to escalate privileges by exploiting improper ownership management when copying a capable file from a nosuid mount. The high EPSS score of 0.61564 and confirmed exploitation indicate this is a significant threat to system integrity.

This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog. Exploitation requires local access to the system.

Recommended Action

Update the Linux kernel to a patched version. Implement strong access controls and minimize local user privileges to reduce the attack surface.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-0386 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2023-0386 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.