CVE-2026-31678 (GCVE-0-2026-31678)
Vulnerability from cvelistv5
Published
2026-04-25 08:46
Modified
2026-04-27 14:04
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: openvswitch: defer tunnel netdev_put to RCU release ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already detached the device. Dropping the netdev reference in destroy can race with concurrent readers that still observe vport->dev. Do not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let vport_netdev_free() drop the reference from the RCU callback, matching the non-tunnel destroy path and avoiding additional synchronization under RTNL.
References
Impacted products
Vendor Product Version
Linux Linux Version: a9020fde67a6eb77f8130feff633189f99264db1
Version: a9020fde67a6eb77f8130feff633189f99264db1
Version: a9020fde67a6eb77f8130feff633189f99264db1
Version: a9020fde67a6eb77f8130feff633189f99264db1
Version: a9020fde67a6eb77f8130feff633189f99264db1
Version: a9020fde67a6eb77f8130feff633189f99264db1
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{
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          "programFiles": [
            "net/openvswitch/vport-netdev.c"
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      "cpeApplicability": [
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          "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-\u003edev.\n\nDo not release vport-\u003edev 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."
        }
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            "version": "3.1"
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      "providerMetadata": {
        "dateUpdated": "2026-04-27T14:04:58.596Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc"
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          "url": "https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643"
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        {
          "url": "https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c"
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      "title": "openvswitch: defer tunnel netdev_put to RCU release",
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    "cveId": "CVE-2026-31678",
    "datePublished": "2026-04-25T08:46:54.476Z",
    "dateReserved": "2026-03-09T15:48:24.130Z",
    "dateUpdated": "2026-04-27T14:04:58.596Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}


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