CVE-2023-0386

KEVLinux 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.

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.

CVSS 3.1 vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

PublishedMar 22, 2023

Last modifiedJun 17, 2026

Added to KEVJun 17, 2025

Remediation dueJul 8, 2025

References

packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlThird Party Advisory
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0aBroken LinkMailing List
lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing ListThird Party Advisory
security.netapp.com/advisory/ntap-20230420-0004/Third Party Advisory
debian.org/security/2023/dsa-5402Third Party Advisory
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0386US Government Resource

0 recent articles mention this CVE

Risk assessment · High

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 475 days
CVSS: 7.8 HIGH
EPSS (30-day exploit probability): 7.9% · top 5% of all CVEs
Weakness: CWE-282

Recommended actions

1.Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.