VULNERABILITY INTELLIGENCE
CVE-2014-8989
CVSS score4.6 MEDIUM
EPSS probability0.50%
CISA KEVNot currently listed
Published2014-11-30
Last modified2026-06-17
CVSS vectorAV:L/AC:L/Au:N/C:P/I:P/A:P
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.