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Thu, 18 Apr 2024 14:44:34 +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 CJcTO9IxIWaAKgAAD6G6ig (envelope-from ); Thu, 18 Apr 2024 14:44:34 +0000 Message-ID: <9e15807be09695bbc35070b558e387237a00c988.camel@suse.de> Subject: Re: CVE-2024-26827: i2c: qcom-geni: Correct I2C TRE sequence From: Jean Delvare To: Greg Kroah-Hartman Cc: cve@kernel.org, linux-kernel@vger.kernel.org Date: Thu, 18 Apr 2024 16:44:33 +0200 In-Reply-To: <2024041842-handrail-distaste-259b@gregkh> References: <2024041703-CVE-2024-26827-67c1@gregkh> <2024041842-handrail-distaste-259b@gregkh> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.42.4 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Spam-Flag: NO X-Spam-Score: -4.30 X-Spam-Level: X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MID_RHS_MATCH_FROM(0.00)[]; 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_THREE(0.00)[3]; 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,imap1.dmz-prg2.suse.org:rdns] On Thu, 2024-04-18 at 15:05 +0200, Greg Kroah-Hartman wrote: > On Thu, Apr 18, 2024 at 02:56:33PM +0200, Jean Delvare wrote: > > Hi Greg, > > > > On Wed, 2024-04-17 at 11:44 +0200, Greg Kroah-Hartman wrote: > > > Description > > > =========== > > > > > > In the Linux kernel, the following vulnerability has been resolved: > > > > > > i2c: qcom-geni: Correct I2C TRE sequence > > > > > > For i2c read operation in GSI mode, we are getting timeout > > > due to malformed TRE basically incorrect TRE sequence > > > in gpi(drivers/dma/qcom/gpi.c) driver. > > > (...) > > > > I was assigned the task to backport this security fix to the SUSE > > kernels. However, from the description, I fail to see how this fix > > qualifies as a security fix. I can't find the reason why a CVE was > > assigned to the issue. > > > > What is the considered attack vector? Or if there is no attack vector, > > what consequence does this bug have, which would put the system > > security at stake? > > We reviewed this commit as fitting the fact that timeouts due to > malformed messages would fit into the definition of "vulnerability" in > the CVE world as it would cause a system to incure "negative impact to > confidentiality, integrity, or availability". If the timeout could be triggered on purpose, then I would agree, as this could possibly be used for a denial-of-service type of attack. But this isn't the case here. All we have is a failure to read data from a random I2C device due to an incorrect programming of the I2C controller. Simple lack of functionality. > If as the i2c maintainer, you don't think this would be the case, we > will be glad to revoke this CVE and just mark it down as a "normal > bugfix". Yes, please. -- Jean Delvare SUSE L3 Support