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 4586158E2D3 for ; Fri, 11 Sep 2026 19:58:51 +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=1789156738; cv=none; b=bklDU9+egCiQNhzlZU4YmI74Blvj2G5TGleAf6KQbugucsNmbDE56MSVsFJM768DE92X22DETJTvIMDmET81yqu5VgCSqkSQHMHlgyFMQuSPVAZgVBEvpQS2jBjMH4gc7dh6yUS4F392yBK4J9V42qpggTUggFgxtGgGheC52aA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789156738; c=relaxed/simple; bh=Wa5F3N0U0ohlErQ7RI25CJL77SK7FK6K2HTlEE5m8Ho=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=qKgllJfndYgrnSGhv2s0P1LEDOuZTDs+LdHJVMdCjykrcbA5SxsoF2uCHamrBN6z8HHEqXLcvYs3huxhS6C0tHz+v1UOvO7aoBpWY5zN9OR2XnAifURHx2voxC2TLgrWGcg8fDKa1QnE7sfzXes67gR+557KfNnr4MCykj95e2A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XIaRNf1Y; 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="XIaRNf1Y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2B8CF1F00893; Fri, 11 Sep 2026 19:58:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789156729; bh=p69VbPVtsYSRGAH2YOArO0rxXc4nwqAS6ziJgyPkGVg=; h=From:To:Cc:Subject:Date:Reply-To; b=XIaRNf1YNnNjpP27OBkC4v1gPSwogdRpgx7BTPS5AF65NZy5reALlQcE0ZSWLF79g 5rBydsm27m0TMeWD33X6/qJ4Yjdp1CrLIdc5u5yCvaJIrcW6r3e+lraJNggNV0A7S9 Lia+SRppxQDhiHx0QiPfBc7QsWSp3dz3cHWlWQJA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89614: ntfs: bound the free-cluster bitmap scan to the volume Date: Fri, 11 Sep 2026 21:45:03 +0200 Message-ID: <2026091135-CVE-2026-89614-db97@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=2599; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=v4ARnMxF/VN8R4ZxcE6PPQPku+oHs0ZojVubiDKYd4w=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlLIgs2evh05D5YY9i4PvuGeMSlkMYj5edFWYoCG9iCt uy2yuLsiGVhEGRikBVTZPmyjefo/opDil6Gtqdh5rAygQxh4OIUgIkcM2CY75vqajch9FpA/oVv PZdW+VstNahnY1gwedObnw9VXh2ZpNMvM/WylEO9IMdEAA== 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: ntfs: bound the free-cluster bitmap scan to the volume vol->lcn_empty_bits_per_page is sized from vol->nr_clusters at mount, but ntfs_cluster_alloc() bounds its scan of that array by the size of $Bitmap. Those are independent on-disk quantities and the mount-time check only rejects a $Bitmap that is too small, so an image whose $Bitmap covers more clusters than the volume has lets the scan index past the array. A run whose LCN lies in that gap takes the allocator straight there, since the caller passes the file's own last LCN as its locality hint. KASAN reports a slab out-of-bounds read when a file on such a volume is extended. Clamp the scan to what that array covers, mirroring the max_index calculation the mount-time scan already uses, and reject a decoded LCN at or beyond nr_clusters in the mapping pairs decoder. Conforming volumes are unaffected. The Linux kernel CVE team has assigned CVE-2026-89614 to this issue. Affected and fixed versions =========================== Issue introduced in 7.1 with commit 11ccc9107dc460de28af90fac1f42404d9802735 and fixed in 7.2.4 with commit dc15a9f5307d5372aef3b64bf3ed7802f530c471 Issue introduced in 7.1 with commit 11ccc9107dc460de28af90fac1f42404d9802735 and fixed in 7.3-rc1 with commit 19cac7902a8ab748e15f98ddaafcf5f8882be21d 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-2026-89614 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: fs/ntfs/lcnalloc.c fs/ntfs/runlist.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/dc15a9f5307d5372aef3b64bf3ed7802f530c471 https://git.kernel.org/stable/c/19cac7902a8ab748e15f98ddaafcf5f8882be21d