linux-kernel - Re: CVE-2023-52656: io_uring: drop any code related to SCM

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Message-ID: <871q5rqhuc.fsf@mailhost.krisman.be>
Date: Fri, 24 May 2024 12:45:31 -0400
From: Gabriel Krisman Bertazi <krisman@...e.de>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-cve-announce@...r.kernel.org,  <cve@...nel.org>,
  <linux-kernel@...r.kernel.org>, Jens Axboe <axboe@...nel.dk>
Subject: Re: CVE-2023-52656: io_uring: drop any code related to SCM_RIGHTS

Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:

> Description
> ===========
>
> In the Linux kernel, the following vulnerability has been resolved:
>
> io_uring: drop any code related to SCM_RIGHTS
>
> This is dead code after we dropped support for passing io_uring fds
> over SCM_RIGHTS, get rid of it.
>
> The Linux kernel CVE team has assigned CVE-2023-52656 to this issue.

Hello Greg,

[+Jens in Cc]

This is stable material, but doesn't deserve CVE status.  There is
nothing exploitable that is fixed here. Instead, this commit is dropping
unreachable code after the removal of a feature, following another CVE
report.  Doing the clean up in the original patch would have made the
real security fix harder to review.

The real issue was reported as CVE-2023-52654 and handled by a different
commit.

-- 
Gabriel Krisman Bertazi