CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2018-13405
The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID.
Severity
- EPSS
- 1.0% chance of exploitation in the next 30 days; higher than 63% of CVEs (scores of 2026-10-31)
- CWE
- CWE-269
- Published
- Modified
- Record from
- the NVD, synced
Affected
- canonical:ubuntu_linux
- debian:debian_linux
- f5:big-ip_access_policy_manager
- f5:big-ip_advanced_firewall_manager
- f5:big-ip_analytics
- f5:big-ip_application_acceleration_manager
- f5:big-ip_application_security_manager
- f5:big-ip_domain_name_system
- f5:big-ip_edge_gateway
- f5:big-ip_fraud_protection_service
- f5:big-ip_global_traffic_manager
- f5:big-ip_link_controller
- f5:big-ip_local_traffic_manager
- f5:big-ip_policy_enforcement_manager
- f5:big-ip_webaccelerator
- fedoraproject:fedora
- linux:linux_kernel
- redhat:enterprise_linux_aus
- redhat:enterprise_linux_desktop
- redhat:enterprise_linux_eus
- redhat:enterprise_linux_for_real_time
- redhat:enterprise_linux_server
- redhat:enterprise_linux_server_aus
- redhat:enterprise_linux_server_tus
- redhat:enterprise_linux_workstation
- redhat:mrg_realtime
- redhat:virtualization