CVE-2023-0386
Linux Kernel Improper Ownership Management Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 8 July 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.88% probability · 94th percentile
- CISA KEV
- Listed 17 June 2025 · due 8 July 2025
- Weakness
- CWE-282
- Affected
- debian/debian linux · netapp/h300s firmware · netapp/h500s firmware · netapp/h700s firmware · netapp/h410s firmware · netapp/h410c firmware · canonical/ubuntu linux · linux/linux kernel
- Source
- secalert@redhat.com
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. For more information, please see: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a ; https://access.redhat.com/security/cve/cve-2023-0386 ; https://security.netapp.com/advisory/ntap-20230420-0004/ ; https://nvd.nist.gov/vuln/detail/CVE-2023-0386
References
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0aBroken Link, Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230420-0004/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5402Third Party Advisory
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0aBroken Link, Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230420-0004/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5402Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0386US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.