All vulnerabilities
CVE-2023-0386

Linux Kernel Improper Ownership Management Vulnerability

Linux KernelOperating systems
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationExploited in the wildAdded to KEV 17 Jun 2025CISA KEV
Exploit odds (EPSS)7.88%Chance of exploitation activity in the next 30 days, higher than 94% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline8 Jul 2025Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 22 Mar 2023, 00:00 UTCPublishedCVE List
  2. 22 Mar 2023Exploit code publicMetasploit
  3. 17 Jun 2025Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Exploit moduleLocal Privilege Escalation via CVE-2023-0386 22 Mar 2023Metasploit

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

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.

Text from CVE List

Affected versions 1

  • Kernelaffected: Linux kernel 6.2-rc6CVE List

References 8