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Known exploited vulnerability

CVE-2023-0386

highCVSS 3.1 7.8In CISA KEVEPSS 7.9%Published · n/a

The short answer

CVE-2023-0386 affects n/a Kernel and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-06-17: attackers are using it, so patch it first. The vendor has linked a patch.

What it is

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.

Weakness: CWE-282.

Severity

7.8 high

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Jun 17, 2025

Federal due date Jul 8, 2025

EPSS, next 30 days

7.9%

Higher than 95% of scored CVEs

How it can be exploited

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says 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.

Affected products

Kernel. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2023-0386 being exploited?

Yes. CISA added CVE-2023-0386 to its Known Exploited Vulnerabilities catalog on 2025-06-17, with a federal remediation due date of 2025-07-08.

How do I fix CVE-2023-0386?

CISA's 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.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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