{"cveID":"CVE-2023-0386","vendorProject":"Linux","product":"Kernel","vulnerabilityName":"Linux Kernel Improper Ownership Management Vulnerability","dateAdded":"2025-06-17","shortDescription":"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.","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","dueDate":"2025-07-08","knownRansomwareCampaignUse":"Unknown","notes":"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https://nvd.nist.gov/vuln/detail/CVE-2023-0386","cwes":["CWE-282"],"year":2023,"state":"stale","stale_reasons":["T1562 was revoked (superseded by T1685)"],"mappings":[{"domain":"enterprise","cve":"CVE-2023-0386","technique":"T1055.012","technique_name_at_mapping":"Process Hollowing","mapping_type":"exploitation_technique","capability_group":"priv_escalation","comments":"Linux kernel's OverlayFS contains a privilege escalation vulnerability that allows a local user with no privileges to obtain root-level privileges.","references":["https://www.vicarius.io/vsociety/posts/cve-2023-0386-a-linux-kernel-bug-in-overlayfs"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2023-0386","technique":"T1548.001","technique_name_at_mapping":"Setuid and Setgid","mapping_type":"exploitation_technique","capability_group":"priv_escalation","comments":"Linux kernel's OverlayFS contains a privilege escalation vulnerability that allows a local user with no privileges to obtain root-level privileges.","references":["https://www.vicarius.io/vsociety/posts/cve-2023-0386-a-linux-kernel-bug-in-overlayfs"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2023-0386","technique":"T1543","technique_name_at_mapping":"Create or Modify System Process","mapping_type":"primary_impact","capability_group":"priv_escalation","comments":"Linux kernel's OverlayFS contains a privilege escalation vulnerability that allows a local user with no privileges to obtain root-level privileges.","references":["https://www.vicarius.io/vsociety/posts/cve-2023-0386-a-linux-kernel-bug-in-overlayfs"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2023-0386","technique":"T1562","technique_name_at_mapping":"Impair Defenses","mapping_type":"secondary_impact","capability_group":"priv_escalation","comments":"Linux kernel's OverlayFS contains a privilege escalation vulnerability that allows a local user with no privileges to obtain root-level privileges.","references":["https://www.vicarius.io/vsociety/posts/cve-2023-0386-a-linux-kernel-bug-in-overlayfs"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1055.012","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Process Hollowing","name_at_mapping":"Process Hollowing","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":5,"has_detection_strategy":true},{"id":"T1543","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Create or Modify System Process","name_at_mapping":"Create or Modify System Process","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":9,"has_detection_strategy":true},{"id":"T1548.001","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Setuid and Setgid","name_at_mapping":"Setuid and Setgid","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":2,"has_detection_strategy":true},{"id":"T1562","domains":["enterprise"],"in_current_bundle":true,"live":false,"name_now":"Impair Defenses","name_at_mapping":"Impair Defenses","renamed":false,"revoked_by":"T1685","mapping_types":["secondary_impact"],"sigma_rule_count":0,"has_detection_strategy":false}],"mapping_types":["exploitation_technique","primary_impact","secondary_impact"],"has_exploitation_technique":true,"mapping_attack_versions":["16.1"],"mapping_domains":["enterprise"],"sigma_coverage":"full","sigma_rules_tagged_cve":[],"added_after_mapping_snapshot":false,"_source":"kevmap","_built":"2026-08-24 19:45 UTC","_attack_version":"19.2"}