CVE-2023-0386
Linux — Linux Kernel Improper Ownership Management Vulnerability
Linux · CWE-282 · in CISA KEV since 2025-06-17
EVRS 75 of 100 Urgent
Patch This Cycle
Rank 1,051 of 2,960 tracked
Raised to the floor for a confirmed exploited vulnerability.
Why it scores 75
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.079.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
- This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. For more information, please see
- access.redhat.com/…/cve-2023-0386
- security.netapp.com/…/ntap-20230420-0004
- nvd.nist.gov/…/CVE-2023-0386
Fixed in
linux -> 6.1.11-1
Affected versions
- debian linux
10.0 - h300s firmware
- h500s firmware
- h700s firmware
- h410s firmware
- h410c firmware
- ubuntu linux
18.0420.0422.04 - linux kernel
>= 5.11 < 5.15.91>= 5.16 < 6.1.96.2
+5 more affected products; see the full list at NVD.
Remediation
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 7.8 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.079 (94.7th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2025-07-08 · KEV since 2025 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | Public module exists | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 7.8 (v3.1), assigned by redhat. | Listed | ENISA EUVD |
Description
NVDA 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.
What CISA says to do
- This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. For more information, please see
- access.redhat.com/…/cve-2023-0386
- security.netapp.com/…/ntap-20230420-0004
- nvd.nist.gov/…/CVE-2023-0386
Public module
Metasploit lists a public excellent-rank module for this CVE: Local Privilege Escalation via CVE-2023-0386 (linux/local/cve_2023_0386_overlayfs_priv_esc). A module existing is not the same as active exploitation; see metasploit.com.