linux-kernel - Re: CVE-2024-35840: mptcp: use OPTION_MPTCP_MPJ_SYNACK in subflow_finish

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Message-ID: <2024061743-aversion-uncured-d770@gregkh>
Date: Mon, 17 Jun 2024 13:31:13 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Michal Hocko <mhocko@...e.com>
Cc: cve@...nel.org, linux-kernel@...r.kernel.org,
	Eric Dumazet <edumazet@...gle.com>,
	linux-cve-announce@...r.kernel.org
Subject: Re: CVE-2024-35840: mptcp: use OPTION_MPTCP_MPJ_SYNACK in
 subflow_finish_connect()

On Mon, Jun 17, 2024 at 01:28:05PM +0200, Michal Hocko wrote:
> On Thu 06-06-24 10:03:59, Michal Hocko wrote:
> > Hi,
> > what is the actual security threat here? As far as I can see, the
> > problem that the commit requested here addresses seems to be rather
> > functional, rather than responding to an unexpected packet options with
> > a reset, we actually establish a connection with some garbage parameters
> > (likely unpredictable). Which is unfortunate but I do not see any
> > security implications.
> 
> Does the silence mean that there are no actual security implications
> here?

Sorry, no, I was traveling and am still trying to catch up with the
pending queue.  Should get to it later today or tomorrow, sorry for the
delay.

greg k-h