{"api_version":"1","generated_at":"2026-06-03T11:06:04+00:00","cve":"CVE-2026-46165","urls":{"html":"https://cve.report/CVE-2026-46165","api":"https://cve.report/api/cve/CVE-2026-46165.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46165","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46165"},"summary":{"title":"openvswitch: vport: fix self-deadlock on release of tunnel ports","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: vport: fix self-deadlock on release of tunnel ports\n\nvports are used concurrently and protected by RCU, so netdev_put()\nmust happen after the RCU grace period.  So, either in an RCU call or\nafter the synchronize_net().  The rtnl_delete_link() must happen under\nRTNL and so can't be executed in RCU context.  Calling synchronize_net()\nwhile holding RTNL is not a good idea for performance and system\nstability under load in general, so calling netdev_put() in RCU call\nis the right solution here.\n\nHowever,\nwhen the device is deleted, rtnl_unlock() will call netdev_run_todo()\nand block until all the references are gone.  In the current code this\nmeans that we never reach the call_rcu() and the vport is never freed\nand the reference is never released, causing a self-deadlock on device\nremoval.\n\nFix that by moving the rcu_call() before the rtnl_unlock(), so the\nscheduled RCU callback will be executed when synchronize_net() is\ncalled from the rtnl_unlock()->netdev_run_todo() while the RTNL itself\nis already released.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-28 10:16:32","updated_at":"2026-06-01 17:17:29"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/3df75fff46b1517eb479d8e6b8e3500763715dd0","name":"https://git.kernel.org/stable/c/3df75fff46b1517eb479d8e6b8e3500763715dd0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/366c482965c673565ecb8bcfb15d5548f13a6a10","name":"https://git.kernel.org/stable/c/366c482965c673565ecb8bcfb15d5548f13a6a10","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6522d59fb7de55ce0f0f285d962243ddffebb01f","name":"https://git.kernel.org/stable/c/6522d59fb7de55ce0f0f285d962243ddffebb01f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c741433f6c8dcdecd1d9549d89053761fd1ea413","name":"https://git.kernel.org/stable/c/c741433f6c8dcdecd1d9549d89053761fd1ea413","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aa69918bd418e700309fdd08509dba324fb24296","name":"https://git.kernel.org/stable/c/aa69918bd418e700309fdd08509dba324fb24296","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8ae6c15fc473c9ad03b0173330cce9a092c76154","name":"https://git.kernel.org/stable/c/8ae6c15fc473c9ad03b0173330cce9a092c76154","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46165","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46165","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9d56aced21fb9c104e8a3f3be9b21fbafe448ffc 8ae6c15fc473c9ad03b0173330cce9a092c76154 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 42f0d3d81209654c08ffdde5a34b9b92d2645896 c741433f6c8dcdecd1d9549d89053761fd1ea413 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bbe7bd722bfaea36aab3da6cc60fb4a05c644643 6522d59fb7de55ce0f0f285d962243ddffebb01f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 98b726ab5e2a4811e27c28e4d041f75bba147eab 3df75fff46b1517eb479d8e6b8e3500763715dd0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6931d21f87bc6d657f145798fad0bf077b82486c 366c482965c673565ecb8bcfb15d5548f13a6a10 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6931d21f87bc6d657f145798fad0bf077b82486c aa69918bd418e700309fdd08509dba324fb24296 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b8c56a3fc5d879c0928f207a756b0f067f06c6a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.168 6.1.175 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.131 6.6.140 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.80 6.12.88 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.21 6.18.30 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19.11 6.20 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"46165","cve":"CVE-2026-46165","epss":"0.000240000","percentile":"0.072780000","score_date":"2026-06-02","updated_at":"2026-06-03 00:08:16"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/openvswitch/vport-netdev.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8ae6c15fc473c9ad03b0173330cce9a092c76154","status":"affected","version":"9d56aced21fb9c104e8a3f3be9b21fbafe448ffc","versionType":"git"},{"lessThan":"c741433f6c8dcdecd1d9549d89053761fd1ea413","status":"affected","version":"42f0d3d81209654c08ffdde5a34b9b92d2645896","versionType":"git"},{"lessThan":"6522d59fb7de55ce0f0f285d962243ddffebb01f","status":"affected","version":"bbe7bd722bfaea36aab3da6cc60fb4a05c644643","versionType":"git"},{"lessThan":"3df75fff46b1517eb479d8e6b8e3500763715dd0","status":"affected","version":"98b726ab5e2a4811e27c28e4d041f75bba147eab","versionType":"git"},{"lessThan":"366c482965c673565ecb8bcfb15d5548f13a6a10","status":"affected","version":"6931d21f87bc6d657f145798fad0bf077b82486c","versionType":"git"},{"lessThan":"aa69918bd418e700309fdd08509dba324fb24296","status":"affected","version":"6931d21f87bc6d657f145798fad0bf077b82486c","versionType":"git"},{"status":"affected","version":"b8c56a3fc5d879c0928f207a756b0f067f06c6a8","versionType":"git"},{"lessThan":"6.1.175","status":"affected","version":"6.1.168","versionType":"semver"},{"lessThan":"6.6.140","status":"affected","version":"6.6.131","versionType":"semver"},{"lessThan":"6.12.88","status":"affected","version":"6.12.80","versionType":"semver"},{"lessThan":"6.18.30","status":"affected","version":"6.18.21","versionType":"semver"},{"lessThan":"6.20","status":"affected","version":"6.19.11","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/openvswitch/vport-netdev.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.0"},{"lessThan":"7.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.88","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.30","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"6.1.168","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.140","versionStartIncluding":"6.6.131","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.88","versionStartIncluding":"6.12.80","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.30","versionStartIncluding":"6.18.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.7","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1-rc3","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: vport: fix self-deadlock on release of tunnel ports\n\nvports are used concurrently and protected by RCU, so netdev_put()\nmust happen after the RCU grace period.  So, either in an RCU call or\nafter the synchronize_net().  The rtnl_delete_link() must happen under\nRTNL and so can't be executed in RCU context.  Calling synchronize_net()\nwhile holding RTNL is not a good idea for performance and system\nstability under load in general, so calling netdev_put() in RCU call\nis the right solution here.\n\nHowever,\nwhen the device is deleted, rtnl_unlock() will call netdev_run_todo()\nand block until all the references are gone.  In the current code this\nmeans that we never reach the call_rcu() and the vport is never freed\nand the reference is never released, causing a self-deadlock on device\nremoval.\n\nFix that by moving the rcu_call() before the rtnl_unlock(), so the\nscheduled RCU callback will be executed when synchronize_net() is\ncalled from the rtnl_unlock()->netdev_run_todo() while the RTNL itself\nis already released."}],"providerMetadata":{"dateUpdated":"2026-06-01T16:19:22.741Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8ae6c15fc473c9ad03b0173330cce9a092c76154"},{"url":"https://git.kernel.org/stable/c/c741433f6c8dcdecd1d9549d89053761fd1ea413"},{"url":"https://git.kernel.org/stable/c/6522d59fb7de55ce0f0f285d962243ddffebb01f"},{"url":"https://git.kernel.org/stable/c/3df75fff46b1517eb479d8e6b8e3500763715dd0"},{"url":"https://git.kernel.org/stable/c/366c482965c673565ecb8bcfb15d5548f13a6a10"},{"url":"https://git.kernel.org/stable/c/aa69918bd418e700309fdd08509dba324fb24296"}],"title":"openvswitch: vport: fix self-deadlock on release of tunnel ports","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46165","datePublished":"2026-05-28T09:36:20.855Z","dateReserved":"2026-05-13T15:03:33.102Z","dateUpdated":"2026-06-01T16:19:22.741Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-28 10:16:32","lastModifiedDate":"2026-06-01 17:17:29","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46165","Ordinal":"1","Title":"openvswitch: vport: fix self-deadlock on release of tunnel ports","CVE":"CVE-2026-46165","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46165","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: vport: fix self-deadlock on release of tunnel ports\n\nvports are used concurrently and protected by RCU, so netdev_put()\nmust happen after the RCU grace period.  So, either in an RCU call or\nafter the synchronize_net().  The rtnl_delete_link() must happen under\nRTNL and so can't be executed in RCU context.  Calling synchronize_net()\nwhile holding RTNL is not a good idea for performance and system\nstability under load in general, so calling netdev_put() in RCU call\nis the right solution here.\n\nHowever,\nwhen the device is deleted, rtnl_unlock() will call netdev_run_todo()\nand block until all the references are gone.  In the current code this\nmeans that we never reach the call_rcu() and the vport is never freed\nand the reference is never released, causing a self-deadlock on device\nremoval.\n\nFix that by moving the rcu_call() before the rtnl_unlock(), so the\nscheduled RCU callback will be executed when synchronize_net() is\ncalled from the rtnl_unlock()->netdev_run_todo() while the RTNL itself\nis already released.","Type":"Description","Title":"openvswitch: vport: fix self-deadlock on release of tunnel ports"}]}}}