CVE-2023-0386—Linux Kernel Improper Ownership Management Vulnerability

Vulnerability Name

Linux Kernel Improper Ownership Management Vulnerability

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.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:

Unknown

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.

Additional Notes

• This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. For more information, please see: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a
• https://access.redhat.com/security/cve/cve-2023-0386
• https://security.netapp.com/advisory/ntap-20230420-0004/
• https://nvd.nist.gov/vuln/detail/CVE-2023-0386

Related News Articles

• CISA warns of attackers exploiting Linux flaw with PoC exploitJune 18, 2025
• CISA Warns of Active Exploitation of Linux Kernel Privilege Escalation VulnerabilityJune 18, 2025

Related Weaknesses

• CWE-282