CVE-2023-0386
Actively exploited. CVE-2023-0386 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-06-17) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2023-0386 is indexed in Metasploit and GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
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.
CSIRTS triage
- What
- An improper ownership management vulnerability allows unauthorized access to setuid files.
- Who is affected
- Local users of the Linux Kernel are affected.
- Urgency
- Immediate remediation is necessary as exploitation is possible and the vulnerability is critical.
- Action
- Update to the latest version of the Linux Kernel.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CVE-2023-0386
Get an email if CVE-2023-0386 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.
Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 94% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2023-0386 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- MetasploitA Metasploit Framework module targets this CVE — weaponized, point-and-click exploitation.look it up ↗
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2023-0386: Linux Kernel Improper Ownership Management Vulnerabilitycisa-kev · 2025-06-17
External references
Embed the live status
— this badge updates automatically when the KEV or exploit status changes. How to embed it →
[](https://www.csirts.com/cve/CVE-2023-0386)