Re: CVE-2021-46934: i2c: validate user data in compat ioctl

[Carlos López]

Hi,

On 27/2/24 10:48, Greg Kroah-Hartman wrote:
> Description
> ===========
>
> In the Linux kernel, the following vulnerability has been resolved:
>
> i2c: validate user data in compat ioctl
>
> Wrong user data may cause warning in i2c_transfer(), ex: zero msgs.
> Userspace should not be able to trigger warnings, so this patch adds
> validation checks for user data in compact ioctl to prevent reported
> warnings

What's the security impact here exactly?

--
Carlos López
Security Engineer
SUSE Software Solutions