{"cve":"CVE-2021-4197","nvd":{"published":"2022-03-23T20:15:10.200","modified":"2026-06-17T04:19:12.030","status":"Modified","description":"An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-287"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=2035652","https://lore.kernel.org/lkml/20211209214707.805617-1-tj%40kernel.org/T/","https://security.netapp.com/advisory/ntap-20220602-0006/","https://www.debian.org/security/2022/dsa-5127","https://www.debian.org/security/2022/dsa-5173"],"products":["broadcom:brocade_fabric_operating_system_firmware","debian:debian_linux","linux:linux_kernel","netapp:h300s_firmware","netapp:h410c_firmware","netapp:h410s_firmware","netapp:h500s_firmware","netapp:h700s_firmware","oracle:communications_cloud_native_core_binding_support_function"],"source":"nvd","synced_at":"2026-10-19T21:29:06.454770966+00:00"},"epss":{"cve":"CVE-2021-4197","score":0.00536,"percentile":0.4523,"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."]}