{"cve":"CVE-2014-8989","nvd":{"published":"2014-11-30T01:59:07.570","modified":"2026-06-17T00:17:36.890","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147864.html","http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147973.html","http://thread.gmane.org/gmane.linux.man/7385/","http://www.mandriva.com/security/advisories?name=MDVSA-2015:058","http://www.openwall.com/lists/oss-security/2014/11/20/4"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T20:34:45.729216538+00:00"},"epss":{"cve":"CVE-2014-8989","score":0.00498,"percentile":0.42707,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}