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.
Product status
a9020fde67a6eb77f8130feff633189f99264db1 (git) before 9d56aced21fb9c104e8a3f3be9b21fbafe448ffc
a9020fde67a6eb77f8130feff633189f99264db1 (git) before 42f0d3d81209654c08ffdde5a34b9b92d2645896
a9020fde67a6eb77f8130feff633189f99264db1 (git) before bbe7bd722bfaea36aab3da6cc60fb4a05c644643
a9020fde67a6eb77f8130feff633189f99264db1 (git) before 98b726ab5e2a4811e27c28e4d041f75bba147eab
a9020fde67a6eb77f8130feff633189f99264db1 (git) before b8c56a3fc5d879c0928f207a756b0f067f06c6a8
a9020fde67a6eb77f8130feff633189f99264db1 (git) before 6931d21f87bc6d657f145798fad0bf077b82486c
4.3
Any version before 4.3
6.1.168 (semver)
6.6.131 (semver)
6.12.80 (semver)
6.18.21 (semver)
6.19.11 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc
git.kernel.org/...c/42f0d3d81209654c08ffdde5a34b9b92d2645896
git.kernel.org/...c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643
git.kernel.org/...c/98b726ab5e2a4811e27c28e4d041f75bba147eab
git.kernel.org/...c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8
git.kernel.org/...c/6931d21f87bc6d657f145798fad0bf077b82486c