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Fri, 24 May 2024 16:45:42 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id Gxh2GTbEUGY+AgAAD6G6ig (envelope-from ); Fri, 24 May 2024 16:45:42 +0000 From: Gabriel Krisman Bertazi To: Greg Kroah-Hartman Cc: linux-cve-announce@vger.kernel.org, , , Jens Axboe Subject: Re: CVE-2023-52656: io_uring: drop any code related to SCM_RIGHTS In-Reply-To: <2024051338-CVE-2023-52656-6545@gregkh> (Greg Kroah-Hartman's message of "Mon, 13 May 2024 15:12:39 +0200") References: <2024051338-CVE-2023-52656-6545@gregkh> Date: Fri, 24 May 2024 12:45:31 -0400 Message-ID: <871q5rqhuc.fsf@mailhost.krisman.be> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-Spam-Level: X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo] X-Spam-Score: -4.30 X-Spam-Flag: NO Greg Kroah-Hartman 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