{"api_version":"1","generated_at":"2026-06-20T13:16:02+00:00","cve":"CVE-2026-52909","urls":{"html":"https://cve.report/CVE-2026-52909","api":"https://cve.report/api/cve/CVE-2026-52909.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52909","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52909"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-06-19 15:16:35","updated_at":"2026-06-19 15:16:35"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9","name":"https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3","name":"https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885","name":"https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-52909","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52909","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 61220ab349485d911083d0b7990ccd3db6c63297 ecf8904067dcba0dad86ece80874841e60317885 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 61220ab349485d911083d0b7990ccd3db6c63297 dcdce3bc9f08026ff3739ee7339e1bef526fc5f3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 61220ab349485d911083d0b7990ccd3db6c63297 d289d5307762d1838aaece22c6b6fcad9e8865f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.36 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.13 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/ip6_vti.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ecf8904067dcba0dad86ece80874841e60317885","status":"affected","version":"61220ab349485d911083d0b7990ccd3db6c63297","versionType":"git"},{"lessThan":"dcdce3bc9f08026ff3739ee7339e1bef526fc5f3","status":"affected","version":"61220ab349485d911083d0b7990ccd3db6c63297","versionType":"git"},{"lessThan":"d289d5307762d1838aaece22c6b6fcad9e8865f9","status":"affected","version":"61220ab349485d911083d0b7990ccd3db6c63297","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/ip6_vti.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.15"},{"lessThan":"3.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.36","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.36","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.13","versionStartIncluding":"3.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"3.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-06-19T14:43:33.214Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885"},{"url":"https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3"},{"url":"https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9"}],"title":"ip6_vti: set netns_immutable on the fallback device.","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-52909","datePublished":"2026-06-19T14:43:33.214Z","dateReserved":"2026-06-09T07:44:35.366Z","dateUpdated":"2026-06-19T14:43:33.214Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-19 15:16:35","lastModifiedDate":"2026-06-19 15:16:35","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"52909","Ordinal":"1","Title":"ip6_vti: set netns_immutable on the fallback device.","CVE":"CVE-2026-52909","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52909","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ip6_vti: set netns_immutable on the fallback device."}]}}}