Threat Intelligence / CVE / CVE-2023-0386

CVE-2023-0386 — Kernel

CISA KEV
CVSS v3.1 7.8 (HIGH) · EPSS 7.8% (higher than 94.3% of all scored CVEs) · Priority 9/10 · Published 2023-03-22

As of 2025-10-21, CVE-2023-0386 is a HIGH-severity vulnerability in Kernel, CVSS v3.1 7.8, EPSS 7.8% (94.3th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-06-17), with a US federal remediation deadline of 2025-07-08. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2023-0386, most recently “EtherHiding: Blockchain-Based C2 on Polygon Fuels ClickFix Backdoor + Banking-Trojan Extension Campaign Adopted by Criminal, North Korean, and Iran-Linked Actors”.

Last updated: 2025-10-21

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.

The record classifies CVE-2023-0386 under weakness class CWE-282. Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 1267 days ago.

Severity and exploitation probability

CVSS v3.1 base score
7.8 — HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST)
7.8% probability of exploitation in the next 30 days, higher than 94.3% of all scored CVEs
CISA KEV
Listed since 2025-06-17, federal remediation deadline 2025-07-08
Threadlinqs priority
9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published
2023-03-22, last modified 2025-10-21

Is CVE-2023-0386 being exploited?

CISA added CVE-2023-0386 to the Known Exploited Vulnerabilities catalog on 2025-06-17, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2025-07-08 under BOD 22-01. Weaponised exploit code for CVE-2023-0386 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 42 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2023-0386

The record marks a vendor fix as available for CVE-2023-0386. Patch reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a. Vendor advisory: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a. Because CVE-2023-0386 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2025-07-08. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2023-0386

1 tracked threat in the Threadlinqs corpus references CVE-2023-0386, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch

Mailing list and disclosure

Other references

Full detection coverage & IOCs for threats exploiting CVE-2023-0386 are available via the Threadlinqs MCP server (Purple tier). View plans →

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