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 4A04658E2A4 for ; Fri, 11 Sep 2026 19:57:22 +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=1789156649; cv=none; b=CUXqJg2gGEI60Ong7unwk3jeeAHCj1YymQ6ZOk2DQ6WeHNQiP2o1S6ZEo/721leTFxWwBhmKcbVHfhSSIbIXZAve9eo4Nba6OE2ZgegXdYDhstYQPdcKI+sT38z4glua/PT5StO5/OLi658WY326BqN+BlGiXvH9EBuKeWdBQv0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789156649; c=relaxed/simple; bh=M6odAfLe5hlOKGuWGY52ikEp8pE5uBOpg7pYpuOKcTI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Ty0ktOZg+ORZsMfYCSwZsxKQ9GeNyH5GKObCbtsgKpTws4ZnY27uhbw3/T/SffU8yReCfJj9PDW+WvZUvXhNbm2pq7FCn6qSuwCgNnTKv2xVwAW4cX1USLmceA4lmc6Mf81L+AoKJbd+PlW5km568OjKjUIC5lv6GpPkvE20HnE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=E+4agjgx; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="E+4agjgx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 378E71F00899; Fri, 11 Sep 2026 19:57:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789156642; bh=bdzhHqDcC0wwGO0rqGPGCD1W5prkfU3mML+whFdGPUw=; h=From:To:Cc:Subject:Date:Reply-To; b=E+4agjgxzbnBsO+dH4YlmM12k9CtwRpbgsKHtTs+0iyfJb78DYFTzoSaOuijpQqah pthEKwABMseZe+u4TVSbkTws4e9hy8BHqF9uARVc5g15f6P0qJXgvz2j/SoZCn2q5h 02B56g6dSQHDtnb51GETQE1ACe860LWSkG+VZHsk= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89584: block: validate user space vectors during extraction Date: Fri, 11 Sep 2026 21:44:33 +0200 Message-ID: <2026091129-CVE-2026-89584-2790@gregkh> X-Mailer: git-send-email 2.55.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2170; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=1gjzJG067vptCbBN2JsmtQbVfwcE9qsLX1giadeX+TY=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlLIjOns042zKphSKqrldo/PX3Gv908MkqWdZK3AkJmO uXzZgd2xLIwCDIxyIopsnzZxnN0f8UhRS9D29Mwc1iZQIYwcHEKwER2uTEsaM81vHhmU6SMm4jj NGYRxtsvFZ55MMzPFuteFH81VWzvuTzLF5Yvnj1ZHDgLAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: block: validate user space vectors during extraction The bio-based drivers don't necessarily check the alignment split, and stacking block drivers don't always handle a misalignment detected after submitting the bio. Validate user vectors against the device's dma_alignment as the bio is built from the iov_iter, rejecting misaligned early with -EINVAL. The Linux kernel CVE team has assigned CVE-2026-89584 to this issue. Affected and fixed versions =========================== Issue introduced in 6.18 with commit 5ff3f74e145adc79b49668adb8de276446acf6be and fixed in 7.2.4 with commit d44a97a3b1c00cc571245124e23e5ceb0a0225a0 Issue introduced in 6.18 with commit 5ff3f74e145adc79b49668adb8de276446acf6be and fixed in 7.3-rc1 with commit 14b007e178811db72fbb1ebb3535160db6ec1e6a 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-2026-89584 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: block/bio.c block/blk-map.c block/fops.c fs/iomap/direct-io.c include/linux/bio.h include/linux/uio.h lib/iov_iter.c 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/d44a97a3b1c00cc571245124e23e5ceb0a0225a0 https://git.kernel.org/stable/c/14b007e178811db72fbb1ebb3535160db6ec1e6a