linux-kernel - Re: CVE-2022-48936: gso: do not skip outer ip header in case of ipip and net

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Message-ID: <2024082958-distress-outmatch-ab28@gregkh>
Date: Thu, 29 Aug 2024 18:58:31 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Willem de Bruijn <willemb@...gle.com>
Cc: Michal Koutný <mkoutny@...e.com>, cve@...nel.org,
	linux-kernel@...r.kernel.org, Tao Liu <thomas.liu@...oud.cn>
Subject: Re: CVE-2022-48936: gso: do not skip outer ip header in case of ipip
 and net_failover

On Thu, Aug 29, 2024 at 12:53:34PM -0400, Willem de Bruijn wrote:
> On Thu, Aug 29, 2024 at 12:18 PM Michal Koutný <mkoutny@...e.com> wrote:
> >
> > On Wed, Aug 28, 2024 at 09:30:08AM GMT, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> > > > What is the security issue here?
> > >
> > > This was assigned as part of the import of the Linux kernel GSD entries
> > > into CVEs as required by the CVE board of directors (hence the 2022
> > > date).  If you don't feel this should be assigned a CVE, just let me
> > > know and I will be glad to reject it.
> >
> > The address of original author bounces back. Willem, could you please
> > help explaining context of the change? (~the questions in my previous
> > message).
> 
> I don't know why this has a CVE.
> 
> The patch reports that the negative effect is a drop due to a corrupted packet.
> 
> According to the CVE report this requires both user input with
> virtio_net_hdr, which is privileged, and a tunnel device configured,
> which again is privileged.
> 

Ok, should it be rejected then?  If so, just let me know.

thanks,

greg k-h