{"schema_version":"1.7.5","id":"CVE-2026-52909","published":"2026-06-19T14:43:33.214Z","modified":"2026-07-24T18:29:48.823923998Z","related":["CGA-gmgv-q3wp-f72g","SUSE-SU-2026:22521-1","SUSE-SU-2026:22522-1","SUSE-SU-2026:22598-1","SUSE-SU-2026:22665-1","SUSE-SU-2026:22666-1","SUSE-SU-2026:22672-1","SUSE-SU-2026:22673-1","SUSE-SU-2026:22674-1","SUSE-SU-2026:22675-1","SUSE-SU-2026:22676-1","SUSE-SU-2026:22677-1","SUSE-SU-2026:22678-1","SUSE-SU-2026:22679-1","SUSE-SU-2026:22680-1","SUSE-SU-2026:22681-1","SUSE-SU-2026:22682-1","SUSE-SU-2026:22683-1","SUSE-SU-2026:22684-1","SUSE-SU-2026:22685-1","SUSE-SU-2026:22686-1","SUSE-SU-2026:22687-1","SUSE-SU-2026:22689-1","SUSE-SU-2026:22690-1","SUSE-SU-2026:22691-1","SUSE-SU-2026:22692-1","SUSE-SU-2026:22693-1","SUSE-SU-2026:22694-1","SUSE-SU-2026:22695-1","SUSE-SU-2026:22696-1","SUSE-SU-2026:22697-1","SUSE-SU-2026:22698-1","SUSE-SU-2026:22710-1","SUSE-SU-2026:22711-1","SUSE-SU-2026:22712-1","SUSE-SU-2026:22713-1","SUSE-SU-2026:22714-1","SUSE-SU-2026:22715-1","SUSE-SU-2026:22716-1","SUSE-SU-2026:22717-1","SUSE-SU-2026:22718-1","SUSE-SU-2026:22719-1","SUSE-SU-2026:22720-1","SUSE-SU-2026:22721-1","SUSE-SU-2026:22722-1","SUSE-SU-2026:22723-1","SUSE-SU-2026:22724-1","SUSE-SU-2026:22725-1","SUSE-SU-2026:22726-1","SUSE-SU-2026:22727-1","SUSE-SU-2026:22728-1","SUSE-SU-2026:22729-1","SUSE-SU-2026:22730-1","SUSE-SU-2026:22731-1","SUSE-SU-2026:22732-1","SUSE-SU-2026:22733-1","SUSE-SU-2026:22734-1","SUSE-SU-2026:22735-1","SUSE-SU-2026:22742-1","SUSE-SU-2026:22743-1","SUSE-SU-2026:22744-1","SUSE-SU-2026:22745-1","SUSE-SU-2026:22746-1","SUSE-SU-2026:22747-1","SUSE-SU-2026:22748-1","SUSE-SU-2026:22749-1","SUSE-SU-2026:22751-1","SUSE-SU-2026:22755-1","SUSE-SU-2026:22758-1","SUSE-SU-2026:22759-1","SUSE-SU-2026:22761-1","SUSE-SU-2026:22762-1","SUSE-SU-2026:22763-1","SUSE-SU-2026:22766-1","SUSE-SU-2026:22769-1","SUSE-SU-2026:22773-1","SUSE-SU-2026:22774-1","SUSE-SU-2026:22775-1","SUSE-SU-2026:22776-1","SUSE-SU-2026:22777-1","SUSE-SU-2026:22778-1","SUSE-SU-2026:22779-1","SUSE-SU-2026:22780-1","SUSE-SU-2026:22781-1","SUSE-SU-2026:22782-1","SUSE-SU-2026:22783-1","SUSE-SU-2026:22784-1","SUSE-SU-2026:22785-1","SUSE-SU-2026:22786-1","SUSE-SU-2026:2799-1","SUSE-SU-2026:2800-1","SUSE-SU-2026:2840-1","SUSE-SU-2026:2841-1","SUSE-SU-2026:2855-1","SUSE-SU-2026:2857-1","SUSE-SU-2026:2858-1","SUSE-SU-2026:2862-1","SUSE-SU-2026:2863-1","SUSE-SU-2026:2864-1","SUSE-SU-2026:2866-1","SUSE-SU-2026:2867-1","SUSE-SU-2026:2868-1","SUSE-SU-2026:2887-1","SUSE-SU-2026:2888-1","SUSE-SU-2026:2889-1","SUSE-SU-2026:2890-1","SUSE-SU-2026:2894-1","SUSE-SU-2026:2895-1","SUSE-SU-2026:2899-1","SUSE-SU-2026:2902-1","SUSE-SU-2026:2910-1","SUSE-SU-2026:2920-1","SUSE-SU-2026:2930-1","SUSE-SU-2026:2932-1","SUSE-SU-2026:2933-1","SUSE-SU-2026:2937-1","SUSE-SU-2026:2938-1","SUSE-SU-2026:2943-1","SUSE-SU-2026:2945-1","SUSE-SU-2026:2956-1","SUSE-SU-2026:2957-1","SUSE-SU-2026:2961-1","SUSE-SU-2026:2989-1","SUSE-SU-2026:2991-1","SUSE-SU-2026:2993-1","SUSE-SU-2026:2997-1","SUSE-SU-2026:3001-1","SUSE-SU-2026:3002-1","SUSE-SU-2026:3008-1","SUSE-SU-2026:3009-1","SUSE-SU-2026:3044-1","SUSE-SU-2026:3075-1","SUSE-SU-2026:3083-1","SUSE-SU-2026:3089-1","SUSE-SU-2026:3156-1","openSUSE-SU-2026:21388-1"],"summary":"ip6_vti: set netns_immutable on the fallback device.","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6_vti: set netns_immutable on the fallback device.\n\njohn1988 and Noam Rathaus reported that vti6_init_net() does not set the\nnetns_immutable flag on the per-netns fallback tunnel device (ip6_vti0).\n\nOther similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel)\ncorrectly set this flag during their fallback device initialization to\nprevent them from being moved to another network namespace.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"61220ab349485d911083d0b7990ccd3db6c63297"},{"fixed":"12acc977838c943636fb01e2f3087d2e4cc3b7cc"},{"fixed":"7f28e3948c59481f8db9c9638e204258d26b4e41"},{"fixed":"12c65e2c7fef507551bd7b52123598a761662c01"},{"fixed":"f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3"},{"fixed":"c5dbd669db5a426b3025512322e1bf2cdbe14305"},{"fixed":"ecf8904067dcba0dad86ece80874841e60317885"},{"fixed":"dcdce3bc9f08026ff3739ee7339e1bef526fc5f3"},{"fixed":"d289d5307762d1838aaece22c6b6fcad9e8865f9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52909.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.15.0"},{"fixed":"5.10.260"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.211"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.177"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.144"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.95"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.36"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.13"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52909.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/12acc977838c943636fb01e2f3087d2e4cc3b7cc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/12c65e2c7fef507551bd7b52123598a761662c01"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7f28e3948c59481f8db9c9638e204258d26b4e41"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c5dbd669db5a426b3025512322e1bf2cdbe14305"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52909.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52909"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52909.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}