{"id":"CVE-2021-38209","details":"net/netfilter/nf_conntrack_standalone.c in the Linux kernel before 5.12.2 allows observation of changes in any net namespace because these changes are leaked into all other net namespaces. This is related to the NF_SYSCTL_CT_MAX, NF_SYSCTL_CT_EXPECT_MAX, and NF_SYSCTL_CT_BUCKETS sysctls.","modified":"2026-03-14T11:04:58.837098Z","published":"2021-08-08T20:15:07.423Z","related":["SUSE-SU-2021:3179-1","SUSE-SU-2021:3205-1","SUSE-SU-2021:3205-2","openSUSE-SU-2021:3179-1","openSUSE-SU-2021:3205-1"],"references":[{"type":"FIX","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/2671fa4dc0109d3fb581bc3078fdf17b5d9080f6"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.12.2"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-38209.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}