CVE-2023-0386 (GCVE-0-2023-0386)
Vulnerability from cvelistv5 – Published: 2023-03-22 00:00 – Updated: 2025-10-21 23:15Summary
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.
Severity
7.8 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-17 03:55 UTC
CWE
Assigner
References
7 references
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: bf2de93d-1464-4bac-96f2-a685c11c30f2
Exploited: Yes
Timestamps
First Seen: 2025-06-17
Asserted: 2025-06-17
Scope
Notes: Linux Kernel Improper Ownership Management Vulnerability | Affected: Linux / Kernel | 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. | 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. | Due date: 2025-07-08 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. For more information, please see: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a ; https://access.redhat.com/security/cve/cve-2023-0386 ; https://security.netapp.com/advisory/ntap-20230420-0004/ ; https://nvd.nist.gov/vuln/detail/CVE-2023-0386
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-282 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Kernel |
| Due Date | 2025-07-08 |
| Date Added | 2025-06-17 |
| Vendorproject | Linux |
| Vulnerabilityname | Linux Kernel Improper Ownership Management Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-10-02 08:09 CEST
| Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 598056d5-04fc-41d3-b401-377be4ebf3e2
Exploited: Yes
Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01
Scope
Notes: 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... | Affected: Linux / Linux kernel | CVSS: 7.8 (HIGH) | EPSS: 0.0788 | Used in malware: unknown | Listed 1 day ahead of CISA KEV | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | 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... |
| Cve Id | CVE-2023-0386 |
| Vendor | Linux |
| Ghsa Id | None |
| Product | Linux kernel |
| Added Date | 2026-06-01T10:33:20.672Z |
| Cvss Score | 7.8 |
| Epss Score | 0.0788 |
| Previous Ids | |
| Cvss Severity | HIGH |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.94535 |
| Used In Malware | unknown |
| Vulnerability Id | CVE-2023-0386 |
| Ahead Of Cisa Kev |
|
| Not Yet In Cisa Kev | False |
References
Created: 2026-10-02 09:10 CEST
| Updated: 2026-10-02 09:10 CEST
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"source": "nvd@nist.gov",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-06-28T05:26:39+00:00",
"cve": "CVE-2023-0386",
"id": "CVE-2023-0386",
"initial_release_date": "2023-01-24T10:00:00+00:00",
"product_status:fixed": "799",
"product_status:known_not_affected": "46",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: FUSE filesystem low-privileged user privileges escalation",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-0386.json",
"version": "3"
},
"vulnrichment": {
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{
"name": "[debian-lts-announce] 20230605 [SECURITY] [DLA 3446-1] linux-5.10 security update",
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"url": "http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html"
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],
"title": "CVE Program Container"
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{
"metrics": [
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"confidentialityImpact": "HIGH",
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},
{
"other": {
"content": {
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"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0386"
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"time": "2025-06-17T00:00:00.000Z",
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"title": "CISA ADP Vulnrichment"
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],
"cna": {
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"datePublished": "2023-03-22T00:00:00.000Z",
"dateReserved": "2023-01-18T00:00:00.000Z",
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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