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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-31678

openvswitch: defer tunnel netdev_put to RCU release

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a9020fde67a6eb77f8130feff633189f99264db1 to < f0ec49d3a39c1f5a4f3270ea27ca0854fad2a2a2affected
  • a9020fde67a6eb77f8130feff633189f99264db1 to < 9d56aced21fb9c104e8a3f3be9b21fbafe448ffcaffected
  • a9020fde67a6eb77f8130feff633189f99264db1 to < 42f0d3d81209654c08ffdde5a34b9b92d2645896affected
  • a9020fde67a6eb77f8130feff633189f99264db1 to < bbe7bd722bfaea36aab3da6cc60fb4a05c644643affected
  • a9020fde67a6eb77f8130feff633189f99264db1 to < 98b726ab5e2a4811e27c28e4d041f75bba147eabaffected
  • a9020fde67a6eb77f8130feff633189f99264db1 to < b8c56a3fc5d879c0928f207a756b0f067f06c6a8affected
  • a9020fde67a6eb77f8130feff633189f99264db1 to < 6931d21f87bc6d657f145798fad0bf077b82486caffected

Linux Linux

Default version status: affected

  • 4.3affected
  • 0 to < 4.3unaffected
  • 5.15.224 to ≤ 5.15.*unaffected
  • 6.1.168 to ≤ 6.1.*unaffected
  • 6.6.131 to ≤ 6.6.*unaffected
  • 6.12.80 to ≤ 6.12.*unaffected
  • 6.18.21 to ≤ 6.18.*unaffected
  • 6.19.11 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References