References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

Change History

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