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Tue, 27 Feb 2024 13:33:51 +0000 Message-ID: <94330624-1f8b-49b8-8a66-b7adf1f589f4@suse.de> Date: Tue, 27 Feb 2024 14:33:50 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: CVE-2021-46934: i2c: validate user data in compat ioctl Content-Language: en-US To: cve@kernel.org, linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman References: <2024022750-CVE-2021-46934-79c8@gregkh> From: =?UTF-8?Q?Carlos_L=C3=B3pez?= In-Reply-To: <2024022750-CVE-2021-46934-79c8@gregkh> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Level: Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=amMilfmY; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=LSSUDJKG X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-6.38 / 50.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; XM_UA_NO_VERSION(0.01)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:98:from]; TO_DN_SOME(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[suse.de:+]; MX_GOOD(-0.01)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; BAYES_HAM(-2.88)[99.50%]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; DWL_DNSWL_MED(-2.00)[suse.de:dkim]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_TLS_ALL(0.00)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:98:from] X-Spam-Score: -6.38 X-Rspamd-Queue-Id: A69191FD29 X-Spam-Flag: NO Hi, On 27/2/24 10:48, Greg Kroah-Hartman wrote: > Description > =========== > > In the Linux kernel, the following vulnerability has been resolved: > > i2c: validate user data in compat ioctl > > Wrong user data may cause warning in i2c_transfer(), ex: zero msgs. > Userspace should not be able to trigger warnings, so this patch adds > validation checks for user data in compact ioctl to prevent reported > warnings What's the security impact here exactly? -- Carlos López Security Engineer SUSE Software Solutions