{"api_version":"1","generated_at":"2026-04-25T13:02:57+00:00","cve":"CVE-2026-31678","urls":{"html":"https://cve.report/CVE-2026-31678","api":"https://cve.report/api/cve/CVE-2026-31678.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31678","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31678"},"summary":{"title":"openvswitch: defer tunnel netdev_put to RCU release","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: defer tunnel netdev_put to RCU release\n\novs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already\ndetached the device. Dropping the netdev reference in destroy can race\nwith concurrent readers that still observe vport->dev.\n\nDo not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let\nvport_netdev_free() drop the reference from the RCU callback, matching\nthe non-tunnel destroy path and avoiding additional synchronization\nunder RTNL.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-25 09:16:01","updated_at":"2026-04-25 09:16:01"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643","name":"https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896","name":"https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8","name":"https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eab","name":"https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eab","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc","name":"https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c","name":"https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31678","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31678","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a9020fde67a6eb77f8130feff633189f99264db1 9d56aced21fb9c104e8a3f3be9b21fbafe448ffc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a9020fde67a6eb77f8130feff633189f99264db1 42f0d3d81209654c08ffdde5a34b9b92d2645896 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a9020fde67a6eb77f8130feff633189f99264db1 bbe7bd722bfaea36aab3da6cc60fb4a05c644643 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a9020fde67a6eb77f8130feff633189f99264db1 98b726ab5e2a4811e27c28e4d041f75bba147eab git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a9020fde67a6eb77f8130feff633189f99264db1 b8c56a3fc5d879c0928f207a756b0f067f06c6a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a9020fde67a6eb77f8130feff633189f99264db1 6931d21f87bc6d657f145798fad0bf077b82486c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.131 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.80 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.21 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.11 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * 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/openvswitch/vport-netdev.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9d56aced21fb9c104e8a3f3be9b21fbafe448ffc","status":"affected","version":"a9020fde67a6eb77f8130feff633189f99264db1","versionType":"git"},{"lessThan":"42f0d3d81209654c08ffdde5a34b9b92d2645896","status":"affected","version":"a9020fde67a6eb77f8130feff633189f99264db1","versionType":"git"},{"lessThan":"bbe7bd722bfaea36aab3da6cc60fb4a05c644643","status":"affected","version":"a9020fde67a6eb77f8130feff633189f99264db1","versionType":"git"},{"lessThan":"98b726ab5e2a4811e27c28e4d041f75bba147eab","status":"affected","version":"a9020fde67a6eb77f8130feff633189f99264db1","versionType":"git"},{"lessThan":"b8c56a3fc5d879c0928f207a756b0f067f06c6a8","status":"affected","version":"a9020fde67a6eb77f8130feff633189f99264db1","versionType":"git"},{"lessThan":"6931d21f87bc6d657f145798fad0bf077b82486c","status":"affected","version":"a9020fde67a6eb77f8130feff633189f99264db1","versionType":"git"}]},{"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":"4.3"},{"lessThan":"4.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.131","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.80","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"4.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.131","versionStartIncluding":"4.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.80","versionStartIncluding":"4.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.21","versionStartIncluding":"4.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.11","versionStartIncluding":"4.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"4.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: defer tunnel netdev_put to RCU release\n\novs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already\ndetached the device. Dropping the netdev reference in destroy can race\nwith concurrent readers that still observe vport->dev.\n\nDo not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let\nvport_netdev_free() drop the reference from the RCU callback, matching\nthe non-tunnel destroy path and avoiding additional synchronization\nunder RTNL."}],"providerMetadata":{"dateUpdated":"2026-04-25T08:46:54.476Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc"},{"url":"https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896"},{"url":"https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643"},{"url":"https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eab"},{"url":"https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8"},{"url":"https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c"}],"title":"openvswitch: defer tunnel netdev_put to RCU release","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31678","datePublished":"2026-04-25T08:46:54.476Z","dateReserved":"2026-03-09T15:48:24.130Z","dateUpdated":"2026-04-25T08:46:54.476Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-25 09:16:01","lastModifiedDate":"2026-04-25 09:16:01","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31678","Ordinal":"1","Title":"openvswitch: defer tunnel netdev_put to RCU release","CVE":"CVE-2026-31678","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31678","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: defer tunnel netdev_put to RCU release\n\novs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already\ndetached the device. Dropping the netdev reference in destroy can race\nwith concurrent readers that still observe vport->dev.\n\nDo not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let\nvport_netdev_free() drop the reference from the RCU callback, matching\nthe non-tunnel destroy path and avoiding additional synchronization\nunder RTNL.","Type":"Description","Title":"openvswitch: defer tunnel netdev_put to RCU release"}]}}}