How severe is CVE-2023-0386?

CVE-2023-0386 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-0386 being actively exploited?

Yes. CVE-2023-0386 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-06-17, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-0386?

CVE-2023-0386 primarily affects Debian Debian Linux. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-0386?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-0386 have an EU (EUVD) identifier?

Yes. CVE-2023-0386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-12447. It is also flagged as exploited in the EUVD (since 2025-06-17).

When was CVE-2023-0386 published?

CVE-2023-0386 was published on 2023-03-22 and last updated on 2026-06-17.

CVE-2023-0386

CVE-2023-0386 is a high-severity vulnerability in Debian Debian Linux with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-06-17). The underlying weakness is classified as CWE-282.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-06-17)
EU (EUVD) id: EUVD-2023-12447
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-06-17)
Weakness: CWE-282
Affected product: Debian Debian Linux
Published: 2023-03-22
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-0386?: 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 severe is CVE-2023-0386?: CVE-2023-0386 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-0386 being actively exploited?: Yes. CVE-2023-0386 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-06-17, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-0386?: CVE-2023-0386 primarily affects Debian Debian Linux. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-0386?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-0386 have an EU (EUVD) identifier?: Yes. CVE-2023-0386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-12447. It is also flagged as exploited in the EUVD (since 2025-06-17).
When was CVE-2023-0386 published?: CVE-2023-0386 was published on 2023-03-22 and last updated on 2026-06-17.

References

Affected products (15)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc5:*:*:*:*:*:*

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