{"id":"CVE-2026-43390","summary":"nstree: tighten permission checks for listing","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnstree: tighten permission checks for listing\n\nEven privileged services should not necessarily be able to see other\nprivileged service's namespaces so they can't leak information to each\nother. Use may_see_all_namespaces() helper that centralizes this policy\nuntil the nstree adapts.","modified":"2026-08-12T03:51:22.206418256Z","published":"2026-05-08T14:21:35.337Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43390.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0abd81645fc95ec6a9d4e4813000f22c5efc0ff4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8d76afe84fa2babf604b3c173730d4d2b067e361"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43390.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43390"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"76b6f5dfb3fda76fce1f9990d6fa58adc711122b"},{"fixed":"0abd81645fc95ec6a9d4e4813000f22c5efc0ff4"},{"fixed":"8d76afe84fa2babf604b3c173730d4d2b067e361"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43390.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43390.json"}}],"schema_version":"1.9.0"}