CVE-2023-0386
HIGHCISA KEVEPSS 94th pctlDescription
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.
How to fix
This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
High risk: more likely to be exploited than 94% of all known CVEs.
Linux Kernel Improper Ownership Management Vulnerability
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.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Remediation due: 2025-07-08
References
Related Vulnerabilities
Other CWE-282 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2026-23514 | High | 8.8 | 1.0% | - | - |
| CVE-2024-8949 | Medium | 6.3 | 0.7% | - | - |
| CVE-2024-3383 | High | 7.4 | 0.6% | - | Fix |
| CVE-2020-10632 | High | 8.8 | 0.5% | - | - |
| CVE-2022-29187 | High | 7.8 | 0.4% | - | Fix |
| CVE-2023-7226 | Medium | 6.3 | 0.4% | - | - |
Common questions
How do I fix CVE-2023-0386?
Published advisories record a fix for 117 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2023-0386 being actively exploited?
Yes. CVE-2023-0386 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2025-07-08. Treat it as a priority whatever its CVSS score says.
How severe is CVE-2023-0386?
CVE-2023-0386 has a CVSS v3 base score of 7.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2023-0386 affect?
Published advisories record a fix for linux (Debian), aws (Ubuntu), aws-5.15 (Ubuntu), aws-5.4 (Ubuntu), and 113 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.