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High severity7.8NVD Advisory· Published Jul 6, 2018· Updated Jun 17, 2026

CVE-2018-13405

CVE-2018-13405

Description

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.

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Affected products

219

Patches

Vulnerability mechanics

References

28

News mentions

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