linux-kernel - Re: Information on use-after-free in smb2_is_status_io

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Date: Fri, 05 Jan 2024 19:14:57 +0100
From: Ben Hutchings <benh@...ian.org>
To: Paulo Alcantara <pc@...guebit.com>, Salvatore Bonaccorso
 <carnil@...ian.org>,  Steve French <sfrench@...ba.org>, Ronnie Sahlberg
 <lsahlber@...hat.com>, Shyam Prasad N <sprasad@...rosoft.com>, Tom Talpey
 <tom@...pey.com>
Cc: linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org, 
	linux-kernel@...r.kernel.org
Subject: Re: Information on use-after-free in smb2_is_status_io_timeout()?

On Fri, 2024-01-05 at 11:04 -0300, Paulo Alcantara wrote:
> Salvatore Bonaccorso <carnil@...ian.org> writes:
> 
> > There is a Red Hat bugzilla report in
> > https://bugzilla.redhat.com/show_bug.cgi?id=2154178 about a
> > use-after-free in smb2_is_status_io_timeout() . While the commit noted
> > initially there seems not correct, Ben Hutchings raised a question on
> > more information in
> > https://bugzilla.redhat.com/show_bug.cgi?id=2154178#c24 .
> > 
> > (there is a CVE assigned for it, CVE-2023-1192)
> 
> That is supposed to be fixed by
> 
>         d527f51331ca ("cifs: Fix UAF in cifs_demultiplex_thread()")
> 
> While the commit refers to an UAF in ->is_network_name_deleted(), this
> should also work for smb2_is_status_io_timeout(), AFAICT.

I think that's a different UAF bug that happens to affect the same
function.

Ben.

-- 
Ben Hutchings - Debian developer, member of kernel, installer and LTS
teams

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