How severe is CVE-2014-8989?

This vulnerability has a severity rating of MEDIUM with a CVSS score of 4.6 out of 10.

What type of vulnerability is CVE-2014-8989?

This is classified as CWE-264, which is a common weakness in software security.

CVE-2014-8989 - MEDIUM Severity | CVSS 4.6

Vulnerability Description

The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a "negative groups" issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c.

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