How severe is CVE-2023-0386?

CVE-2023-0386 has a CVSS score of 7.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-0386?

Affected package information for CVE-2023-0386 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2023-0386?

No fixed version has been published for CVE-2023-0386 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2023-0386 actively exploited in the wild?

Yes. There are 17 known exploit references for CVE-2023-0386, including 9 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2023-0386?

CVE-2023-0386 has an EPSS (Exploit Prediction Scoring System) score of 48.5%, placing it in the 98th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2023-0386 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2023-0386 (Linux Kernel Improper Ownership Management Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2025-06-17. CISA required all US federal civilian agencies to remediate this vulnerability by 2025-07-08. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

When was CVE-2023-0386 published, and has it been updated?

CVE-2023-0386 was published on March 22, 2023 and was last updated on March 14, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2025-06-17 — agencies required to remediate by 2025-07-08

CVE-2023-0386

HIGH

Published

Mar 22, 2023

Updated

Mar 14, 2026

Affected

0 pkgs

Patched

None yet

Exploits

17 known

EPSS Exploitation Probability

via FIRST.org ↗

48.5%probability of exploitation in next 30 days

High Risk98th percentile-2.10%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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.

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.