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

Required action (CISA's text)

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

Description (NVD)

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.

SOURCES

• CISA KEVCISA Known Exploited Vulnerabilities catalog

Other Linux flaws

• CVE-2026-46300: Linux Kernel Missing Initialization of a Variable Vulnerability
• CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability
• CVE-2025-39964: Linux Kernel Race Condition Vulnerability
• CVE-2025-39682: Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
• CVE-2026-53362: Linux Kernel Unspecified Vulnerability

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.