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 CEC591DDCE for ; Sun, 19 May 2024 10:11:25 +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=1716113486; cv=none; b=RRlEOGTHPrHUvddvhBJWHlw9QLMoQhAM8j+VrKhkrJf8c7UPwS9+1BNkro/7MhczqABvWj/IBQK18TQMaqWD24kK7ookDyAcUM8v9EA08a/wbsFmrRHH48MlFlmS+8cU0yEkzVbtFSeYmuMYoLq8/xpMrNIZBO331QTHO/APgy8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716113486; c=relaxed/simple; bh=Bwq/UdyP4wzp4GpBEf5D2vbxBF+zEkwHvpldn6W6GRw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=L6+Z6kxzkNaCI5Ct0NFhaMKxjUAv6x75eFXReIFEM73pCk5dctjcxTVjeWX4HcefWX4Iat3vHONYcobFT8/InUxmbkZ8kxac/dumJq1lYzwHEdf2PZ432QOXOKi0hETt5Bz3nha9mG4dEQO5xyxjilQYP2ZqcvvyxEqDoo2x938= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Fx1rXpAq; 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="Fx1rXpAq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DFDDFC32781; Sun, 19 May 2024 10:11:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1716113485; bh=Bwq/UdyP4wzp4GpBEf5D2vbxBF+zEkwHvpldn6W6GRw=; h=From:To:Cc:Subject:Date:Reply-to:From; b=Fx1rXpAq7RVW+eiD1zUJb7zQTIs7ttemXDHLHYEUHDHPVH6lDdLEZ4sn1K5rVA3UK xQLZfowdCI1HF9KBwGjMqBh6fb0+wkkJJNiFoR7T96iBrqcX6UWkZr0B3WXijZ1u29 6wCXilQWAtXh7StA7Ahr8EHtum080xHTE645PxWU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2024-35918: randomize_kstack: Improve entropy diffusion Date: Sun, 19 May 2024 12:11:12 +0200 Message-ID: <2024051912-CVE-2024-35918-3fed@gregkh> X-Mailer: git-send-email 2.45.1 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=2304; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=Bwq/UdyP4wzp4GpBEf5D2vbxBF+zEkwHvpldn6W6GRw=; b=owGbwMvMwCRo6H6F97bub03G02pJDGmeFxyK5sgdvb1SxJfxAtPPpcuDb341XPLfUOfflNvf3 sW/Tr+Y3RHLwiDIxCArpsjyZRvP0f0VhxS9DG1Pw8xhZQIZwsDFKQATYZZhWHDoT07X5AfCthUc S0Miz1knS34/UckwT3l78+sD//48m/WWVevGm+hi68tVrwA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit Description =========== In the Linux kernel, the following vulnerability has been resolved: randomize_kstack: Improve entropy diffusion The kstack_offset variable was really only ever using the low bits for kernel stack offset entropy. Add a ror32() to increase bit diffusion. The Linux kernel CVE team has assigned CVE-2024-35918 to this issue. Affected and fixed versions =========================== Issue introduced in 5.13 with commit 39218ff4c625 and fixed in 5.15.155 with commit dfb2ce952143 Issue introduced in 5.13 with commit 39218ff4c625 and fixed in 6.1.86 with commit e80b4980af26 Issue introduced in 5.13 with commit 39218ff4c625 and fixed in 6.6.27 with commit 300a2b9c2b28 Issue introduced in 5.13 with commit 39218ff4c625 and fixed in 6.8.6 with commit 6be74b1e21f8 Issue introduced in 5.13 with commit 39218ff4c625 and fixed in 6.9 with commit 9c573cd31343 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2024-35918 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: include/linux/randomize_kstack.h Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/dfb2ce952143de60dd756ed666901236c76cb3fa https://git.kernel.org/stable/c/e80b4980af2688d8ff69c157ffa773dd1f1eb02c https://git.kernel.org/stable/c/300a2b9c2b28282974ee300bb5d5025cbbb1f64c https://git.kernel.org/stable/c/6be74b1e21f8de4c48af772c2f658b464bfe6145 https://git.kernel.org/stable/c/9c573cd313433f6c1f7236fe64b9b743500c1628