From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 DAF412222AC; Fri, 16 Oct 2026 06:30:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792132228; cv=none; b=RdrQckfiH9DHlumstR6vHprSuN5TPDqcb/0PtAga6DmdoD39i6zIwikvYy9yUos74/aDlgtkzfl7DnWLWla0yRkUm43dPTEUfuL3VMeneOW3IrvXWi9vB8wb89EyEZLhRL9LlPp9Ou2xQ25i5hub3aRQU4meIBQa4c376Bav0GA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792132228; c=relaxed/simple; bh=mdVtYsa5pjYJJt+mMTMlUZ4lczKc1ykgO5KVKuLw870=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=EZGcEYlTfG+2Ncd9tu8fIsCi3Xww8Gcw1tYNmgpdYqjJ1fISYvKcut4KAoxyGizl+Nd+DBIVADWfll7D84wyoVYjRVeSvAogf4EOg9q6L2ZEIZMkGphZ7D2gclPDtMHWrVRAAZRFhdFvA2F/vjGgmX5ZEpIpHEjus+L4YXcxbmQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UqiRg07A; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="UqiRg07A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8C6B1F000C4; Fri, 16 Oct 2026 06:30:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792132227; bh=aOutpvUO1skhtxBDdAGixu5GIwSj1eVe3ICCxPK6lQA=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=UqiRg07AEkpFwAN9Nxv40yMItfm26AADMyNKtHZAlnuYniaJajcCTK8ErMCobY8nW rZpMb1OTwvJ7U39VQt8ym4lRIdUGJuJIbDvTnlpz40XRfGNkrRorASJpJqR5T0ny0A ICM4psW6cNcoQXV81lS/wpNKFwQsSaWXBBGCkEBOvhoEzBhS8NkiEGXxxrw3g22xwo qtu91mAYOvbsSL23pM9IUwrzxr0S6nmK+5TXWMqmMqdiTg7rtvloFnqcb0hB0rDQ1N IKTpxAPUPhJnescMWogCIqC40HH9y67UiHKRWNNI4TEW3CXeYqR5mfbXRvBeJ33dgP qYzUDGsrA9ogw== Date: Fri, 16 Oct 2026 08:30:21 +0200 From: Greg Kroah-Hartman To: Oleg Nesterov Cc: Kees Cook , cve@kernel.org, linux-kernel@vger.kernel.org, linux-cve-announce@vger.kernel.org, Jinjie Ruan Subject: Re: CVE-2026-89603: entry: Fix seccomp bypass after ptrace with TSYNC Message-ID: <2026101611-deputize-life-301e@gregkh> References: <2026091133-CVE-2026-89603-dad5@gregkh> <20261015162119.1a1e0d-kees@kernel.org> 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 Thu, Oct 15, 2026 at 06:34:13PM +0200, Oleg Nesterov wrote: > On 10/15, Kees Cook wrote: > > > > On Fri, Sep 11, 2026 at 09:44:52PM +0200, Greg Kroah-Hartman wrote: > > > This race condition could allow an unprivileged process to execute > > > a prohibited system call (e.g., execve) that the newly installed filter > > > was intended to block, especially since the tracer might have modified > > > the system call number during the ptrace stop. > > > > I'm disputing this one: please reject CVE-2026-89603. The fix is a fine > > consistency change, but the flaw gave neither the tracer nor the tracee > > anything they didn't already have. > > Thanks Kees! > > I fully agree with both points. The patch is fine, but it doesn't fix > any security problem. Now rejected, thanks for the review and letting us know! greg k-h