{"cve":"CVE-2026-31678","nvd":{"published":"2026-04-25T09:16:01.437","modified":"2026-10-19T19:18:05.897","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-367","CWE-362"],"references":["https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896","https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c","https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eab","https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc","https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2026-31678","score":0.00132,"percentile":0.02741,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}