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 244C731ED81 for ; Sat, 15 Aug 2026 06:15:37 +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=1786774538; cv=none; b=qv67htxcb3/PpaK6gpzvwmHPoCBT7S6wyvrt+Tm+SYU9y9rJvjEzbP9xnstyIXSKgj9UiyvePvwWirHw97dQjzf8N6PzSB3JbFZmG5XHqr6BrH5pqbQWKdW6NfEwQDsknrUuXzALxZMKa6HhNKLKljOESsjD8GvA8Hhjce3I1co= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786774538; c=relaxed/simple; bh=V6ffSw1pKQDS1ilDYgf7NAqTUBtrgaiucGUmdM/Byio=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=CrtOjcvCw0PGtkgy2qkZIWZ2aVe1ujiBBMZNNt+Am6CtemtTK8EtalUISmX4pPOp9t+ZoqWhcVr6k9wvWkOZGhhx46EY5kSucjpCOEZ48K5SvkRFD5peeFDXiwxDpTPJyKsPqmck/t8bIbJ/aoAsXlj0Hofe+xBS9ALgAykj0YQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Y4eewzKd; 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="Y4eewzKd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 78E841F000E9; Sat, 15 Aug 2026 06:15:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786774537; bh=UBy+/QmlNnZa6Yx5V3bK/fkEE4+Yic0j6+R+5vp+wJY=; h=From:To:Cc:Subject:Date:Reply-To; b=Y4eewzKdU5pZQ6pB2zVxe1mzOzo4CmlPDCe4flq0yIzW5kz0XGIt2SsNe6D+HWhrX lMODQNkDweHwORY4rk+wBqIlw+719eSsITbo5VQQIRCwrzzI+bbuayVghxIc6umlz/ hy5Ybvd9/ELuQBUQiAC7TIDAtosCmIQnfrLBtkA8= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-72188: ntfs: sanitize MFT references returned from ntfs_lookup_inode_by_name() Date: Sat, 15 Aug 2026 15:04:27 +0900 Message-ID: <2026081541-CVE-2026-72188-0c40@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=2678; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=WlpuiVBIt91tH3N12nAEXMoRWmXRrooNdyGZ95RNX/g=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDEcd79t1OnZyq8fHVArbGbyKSLct/qqZOGtysYwEp 665lHZHLAuDIBODrJgiy5dtPEf3VxxS9DK0PQ0zh5UJZAgDF6cATKRkI8M85a0/Xz3jUHi/tXW2 ipmsQ/49rWudDAs6pBirWYRn367eKHdp5rqn9jmrawwB 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: sanitize MFT references returned from ntfs_lookup_inode_by_name() ntfs_lookup_inode_by_name() returns MFT references read from directory index entries on disk. These values are untrusted, but the function can currently return an error-marked MFT reference to its callers without validating it. Callers later decode lookup failures with MREF_ERR(). A crafted NTFS image can set the MREF error bit while leaving the low bits as an arbitrary value, causing callers to consume a bogus pseudo-errno instead of treating the lookup result as corrupted on-disk metadata. Fix this at the source by normalizing every error-marked MFT reference returned from ntfs_lookup_inode_by_name() to ERR_MREF(-EIO). Apply this to all four directory lookup return paths so every caller gets a validated result without needing additional checks or an API change. This keeps the sanitization in the common lookup helper, which is cleaner than duplicating validation in each caller. The Linux kernel CVE team has assigned CVE-2026-72188 to this issue. Affected and fixed versions =========================== Issue introduced in 7.1 with commit 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 and fixed in 7.1.5 with commit 83f396d881c4fd312c7fd5fff2c157fc21104464 Issue introduced in 7.1 with commit 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 and fixed in 7.2-rc3 with commit d97a36bae86a9a4021562ded2987f904e6bcb1d7 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-2026-72188 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/dir.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/83f396d881c4fd312c7fd5fff2c157fc21104464 https://git.kernel.org/stable/c/d97a36bae86a9a4021562ded2987f904e6bcb1d7