CVE-2023-53000

netlink: prevent potential spectre v1 gadgets

Description

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.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/3e5082b1c66c7783fbcd79b5b178573230e528ff
https://git.kernel.org/stable/c/539ca5dcbc91134bbe2c45677811c31d8b030d2d
https://git.kernel.org/stable/c/41b74e95f297ac360ca7ed6bf200100717cb6c45
https://git.kernel.org/stable/c/992e4ff7116a77968039277b5d6aaa535c2f2184
https://git.kernel.org/stable/c/f0950402e8c76e7dcb08563f1b4e8000fbc62455

Frequently Asked Questions

What is the severity of CVE-2023-53000?: CVE-2023-53000 has not yet been assigned a CVSS score.
How to fix CVE-2023-53000?: To fix CVE-2023-53000, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-53000 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-53000 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-53000?: CVE-2023-53000 affects Linux Linux, Linux Linux.

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