openvswitch: defer tunnel netdev_put to RCU release
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 99% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486chttps://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eabhttps://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffchttps://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643