Ther OverlayFS vulnerability CVE-2023-0386: Overview, detection, and remediation

Introduction

On March 22, 2023, a vulnerability in the Linux kernel was publicly disclosed. It is a local privilege escalation vulnerability, allowing an unprivileged user to escalate their privileges to the root user.

Key points and observations:

• January 27, 2023: Vulnerability is patched on the Linux source tree


• March 22, 2023: Vulnerability is publicly disclosed on the NIST NVD as CVE-2023-0386


• May 4, 2023: Proof-of-concept (PoC) exploits appear on GitHub

The vulnerability, dubbed CVE-2023-0386, is trivial to exploit and applicable …

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