CVE-2023-0386
Linux Kernel Improper Ownership Management Vulnerability
- High 7.8
- Exploited: added to CISA KEV 17 Jun 2025
Description
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.
Key facts
- Published
- 22 Mar 2023
- Last changed
- 21 Oct 2025
- Assigned by
- redhat
- KEV added
- 17 Jun 2025
- KEV fix due
- 8 Jul 2025
- EPSS
- 7.88% likely to be exploited in the next 30 days, higher than 94.798% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 7.8CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply 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 required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | Kernel |
|
Timeline
- 22 Mar 2023 Published
- 17 Jun 2025 CVE-2023-0386 added to CISA KEV
- 17 Jun 2025 Added to the CISA KEV catalogue