In the Linux kernel, the following vulnerability has been resolved:

netlink: prevent potential spectre v1 gadgets

Most netlink attributes are parsed and validated from
__nla_validate_parse() or validate_nla()

    u16 type = nla_type(nla);

    if (type == 0 || type > maxtype) {
        /* error or continue */
    }

@type is then used as an array index and can be used
as a Spectre v1 gadget.

array_index_nospec() can be used to prevent leaking
content of kernel memory to malicious users.

This should take care of vast majority of netlink uses,
but an audit is needed to take care of others where
validation is not yet centralized in core netlink functions.

https://git.kernel.org/stable/c/3e5082b1c66c7783fbcd79b5b178573230e528ff

https://git.kernel.org/stable/c/41b74e95f297ac360ca7ed6bf200100717cb6c45

https://git.kernel.org/stable/c/539ca5dcbc91134bbe2c45677811c31d8b030d2d

https://git.kernel.org/stable/c/992e4ff7116a77968039277b5d6aaa535c2f2184

https://git.kernel.org/stable/c/f0950402e8c76e7dcb08563f1b4e8000fbc62455