From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 83C3136AE1 for ; Thu, 29 Feb 2024 05:22:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709184157; cv=none; b=cUzyzNFsHIM5NiIQoGtqhCz2++jtkDSXcgkQrWGpVlF0CnD6gB+gCRttg6rpEFNrGT1PgsLz28+z648EdqCRh5g/ZewrnITfMrojh9HadPapgKV1WvIstSTT0LXPVq2nbsbXosUBVokcZXyHiHPDU+dGFuGMScir0E8hH8dlwwA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709184157; c=relaxed/simple; bh=oNX4WDKOi3u73StaYCbLq0KirwMdi79LCSisLZhHFs0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=XM7zRtVP+P0J+pYKEgFjsU6IsSySImBL5VxxXbhGePe4pdCNhAnFJNX69mfhM0KGHagrlBcmOX2JjaJnNPKRj/pNZpB22qyK9ERXkebMJ1hsNciBmrR20fQytClDx202jG/9HoJLoy2hbvDRLDdBIWMJMgwB4T11Q/Eey2/5oUg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vm1E9n6H; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="vm1E9n6H" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE86AC433F1; Thu, 29 Feb 2024 05:22:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1709184157; bh=oNX4WDKOi3u73StaYCbLq0KirwMdi79LCSisLZhHFs0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=vm1E9n6HG2cBM66J7owZRDiH3B2WO2f54gxMPbNz9Qud89pY6N6/+whuUIpqjmKvz RakEwfWQrgUMfphSKQ7WsUVYHW0KazLAvHyD+7cxQr/AHXxgkZN1qrHV56JdMYT2cV 7AG2Ihsn3+/d13Eu20FsFFNTF/PvTv7d/WMsTzlE= Date: Thu, 29 Feb 2024 06:22:34 +0100 From: Greg Kroah-Hartman To: Michal Hocko Cc: cve@kernel.org, linux-kernel@vger.kernel.org Subject: Re: CVE-2021-46966: ACPI: custom_method: fix potential use-after-free issue Message-ID: <2024022902-prancing-judgingly-c9ee@gregkh> References: <2024022720-CVE-2021-46966-1469@gregkh> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, Feb 28, 2024 at 05:14:22PM +0100, Michal Hocko wrote: > Hi, > this seems like another example of a reasonable fix with a very dubious > CVE IMHO. Allowing access to /sys/kernel/debug/acpi/custom_method to > anybody but trusted actor is a huge security problem on its own. I > really fail to see any value marking this clear bug fix as security > related. It was picked because it was a use-after-free fix, AND it is part of the "import the GSD database into the CVE database" that the CVE project asked us to do. thanks, greg k-h