{"id":"CVE-2026-52909","revision":"78190b02d79649dabbbce5cc96c28336","records":[{"revision":"78190b02d79649dabbbce5cc96c28336","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-52909","aliases":[],"title":"ip6_vti: set netns_immutable on the fallback device.","description":"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.","state":0,"publishedAt":"2026-06-19T14:43:33.214+00:00","modifiedAt":"2026-10-19T19:36:59.506+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv6/ip6_vti.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"61220ab349485d911083d0b7990ccd3db6c63297\",\n                            \"lessThan\": \"12acc977838c943636fb01e2f3087d2e4cc3b7cc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"61220ab349485d911083d0b7990ccd3db6c63297\",\n                            \"lessThan\": \"7f28e3948c59481f8db9c9638e204258d26b4e41\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"61220ab349485d911083d0b7990ccd3db6c63297\",\n                            \"lessThan\": \"12c65e2c7fef507551bd7b52123598a761662c01\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"61220ab349485d911083d0b7990ccd3db6c63297\",\n                            \"lessThan\": \"f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"61220ab349485d911083d0b7990ccd3db6c63297\",\n                            \"lessThan\": \"c5dbd669db5a426b3025512322e1bf2cdbe14305\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"61220ab349485d911083d0b7990ccd3db6c63297\",\n                            \"lessThan\": \"ecf8904067dcba0dad86ece80874841e60317885\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"61220ab349485d911083d0b7990ccd3db6c63297\",\n                            \"lessThan\": \"dcdce3bc9f08026ff3739ee7339e1bef526fc5f3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"61220ab349485d911083d0b7990ccd3db6c63297\",\n                            \"lessThan\": \"d289d5307762d1838aaece22c6b6fcad9e8865f9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv6/ip6_vti.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.260\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.211\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.177\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.144\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.95\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.36\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.13\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/12acc977838c943636fb01e2f3087d2e4cc3b7cc","https://git.kernel.org/stable/c/7f28e3948c59481f8db9c9638e204258d26b4e41","https://git.kernel.org/stable/c/12c65e2c7fef507551bd7b52123598a761662c01","https://git.kernel.org/stable/c/f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3","https://git.kernel.org/stable/c/c5dbd669db5a426b3025512322e1bf2cdbe14305","https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885","https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3","https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-52909","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-52909","identifiers":["CVE-2026-52909"]},"retained":false,"historicalAffected":[]}],"coverage":[]}