# CVE-2023-0386 — Kernel **CISA KEV** > 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](https://cwe.mitre.org/data/definitions/282.html). 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 1281 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. - [xkaneiki/CVE-2023-0386](https://github.com/xkaneiki/CVE-2023-0386) (github) - [chenaotian/CVE-2023-0386](https://github.com/chenaotian/CVE-2023-0386) (github) - [sxlmnwb/CVE-2023-0386](https://github.com/sxlmnwb/CVE-2023-0386) (github) - [Fanxiaoyao66/CVE-2023-0386](https://github.com/Fanxiaoyao66/CVE-2023-0386) (github) - [puckiestyle/CVE-2023-0386](https://github.com/puckiestyle/CVE-2023-0386) (github) - [veritas501/CVE-2023-0386](https://github.com/veritas501/CVE-2023-0386) (github) - [Satheesh575555/linux-4.19.72_CVE-2023-0386](https://github.com/Satheesh575555/linux-4.19.72_CVE-2023-0386) (github) - [P4x1s/CVE-2023-0386](https://github.com/P4x1s/CVE-2023-0386) (github) ## Affected products and versions - **(vendor unspecified)**: Kernel ## 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](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](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. - [EtherHiding: Blockchain-Based C2 on Polygon Fuels ClickFix Backdoor + Banking-Trojan Extension Campaign Adopted by Criminal, North Korean, and Iran-Linked Actors](https://intel.threadlinqs.com/threat/TL-2026-2273) — HIGH · 2026-09-01 ## Sources Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-09-03. This product uses the NVD API but is not endorsed or certified by the NVD. **Vendor advisory and patch** - [debian.org — vendor advisory](https://www.debian.org/security/2023/dsa-5402) **Mailing list and disclosure** - [lists.debian.org — mailing list](https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html) - [lists.debian.org — mailing list (msg00020)](https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html) **Other references** - [git.kernel.org](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a) - [security.netapp.com](https://security.netapp.com/advisory/ntap-20230420-0004/) - [packetstormsecurity.com](http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html) Canonical: https://intel.threadlinqs.com/cve/CVE-2023-0386 Full detection coverage and IOCs for threats exploiting CVE-2023-0386 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp