CVEs / CVE-2023-0386
CVE-2023-0386: Linux Kernel Improper Ownership Management Vulnerability
- Known exploited in the CISA KEV catalog since 17 Jun 2025
- high 7.8 CVSS 3.1 (NVD)
- EPSS 7.88% chance of exploitation in the next 30 days, higher than 94% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a Kernel | Linux kernel 6.2-rc6 | — |
Exploitation
| In CISA KEV since | 17 Jun 2025 |
|---|---|
| Due date for US federal agencies | 8 Jul 2025 |
| Used in ransomware campaigns | Unknown |
| Required 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. |
Severity
| CVSS 3.1 | 7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-282 |
References
- CVE-2023-0386 on NVD
- CVE-2023-0386 in the CISA KEV catalog
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a (cited by CISA)
- https://access.redhat.com/security/cve/cve-2023-0386 (cited by CISA)
- https://security.netapp.com/advisory/ntap-20230420-0004/ (cited by CISA)
- CVE-2023-0386 on OSV
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a Broken Link, Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230420-0004/ Third Party Advisory
- https://www.debian.org/security/2023/dsa-5402 Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0386 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.