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 438C93EDAB6 for ; Fri, 8 May 2026 14:23:07 +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=1778250187; cv=none; b=m26qP67sxl+2+IcA4OnSLsKb+4cDOjuFwWoVV1o0Fi4xik6KFcyYmc0d6k74C6Sw44cRVL5q34L3EoMOg+6c5ftC9b5C+dxEkglt+7cuaMJLapCYJQUbHceXtoVUkOwEE6RWqdhxtPZv8/yXQfHe9dmjLfK2KZpJSqPU+OlY9Vk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250187; c=relaxed/simple; bh=ZMFkM93WVw0u9Gj4MHLjY6kcsVkGe70aFQDC+NrR1o8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=BTzBrTR89an9S09MdWYPEPhc+GE/pNapYohDrkyLN3kjab/wgE8WPEByBwc1zOHUI7V2eHTXGO/9L0s3QhUQwCZwpiyb4/mVJb1Hhtz4reFYNMc1DrNbry5iSfX7kDa0Te+t+ci5313dzCBr9wWnwhdb7D2fmaRntymdqqPjq/E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=b+/Ze/3D; 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="b+/Ze/3D" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D1DFBC2BCC7; Fri, 8 May 2026 14:23:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250187; bh=ZMFkM93WVw0u9Gj4MHLjY6kcsVkGe70aFQDC+NrR1o8=; h=From:To:Cc:Subject:Date:Reply-To:From; b=b+/Ze/3Dk//DJbZeiBqPegscxdIONDqg0JxBX1AoXecXsNftT1rcQg+zfVaUh3s9y 8vbP6vUT8bbfhxJ4ahgtLX7Q85YanP8+lzVCrpsHLYrQK1fiDmuEx5LKtXLEi1zbBP ojC7qrCqSCjsIEqFLVWv5nF6HTDYOMYqjrLXgYTg= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43377: ksmbd: Don't log keys in SMB3 signing and encryption key generation Date: Fri, 8 May 2026 16:21:46 +0200 Message-ID: <2026050831-CVE-2026-43377-b039@gregkh> X-Mailer: git-send-email 2.54.0 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=2899; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=v4SsKgnEx/ADlNaoVLMARrJbrm7oqfU9IKftfV82MWw=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/P+bc81nY7KPUkaj/MuqQeLb4g7ym1dknjCrtJgo/n euwNkOjI5aFQZCJQVZMkeXLNp6j+ysOKXoZ2p6GmcPKBDKEgYtTACaS/YJhwcJVC/0n6KmGij8L yOXb88do9oHbFQwLDnhN2PiS+YhZmnX4vD8vl9oWt2ysAwA= 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: ksmbd: Don't log keys in SMB3 signing and encryption key generation When KSMBD_DEBUG_AUTH logging is enabled, generate_smb3signingkey() and generate_smb3encryptionkey() log the session, signing, encryption, and decryption key bytes. Remove the logs to avoid exposing credentials. The Linux kernel CVE team has assigned CVE-2026-43377 to this issue. Affected and fixed versions =========================== Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 6.1.167 with commit 4084ed720d7d5f4e975c9e4a6267a552dad3b24a Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 6.6.130 with commit fec5c70b82af3f59f15bb984df94e5ad1fccfb1e Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 6.12.78 with commit 3fe2d9ec166b7df9a8df6c0fdcfc210572e27e3f Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 6.18.20 with commit 407cc37c21d51f9b9d4d20204b04890880cfa6ae Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 6.19.9 with commit c6b01b997a2094969e315f1ebfc1d64b8ae2163d Issue introduced in 5.15 with commit e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and fixed in 7.0 with commit 441336115df26b966575de56daf7107ed474faed 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-2026-43377 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/smb/server/auth.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/4084ed720d7d5f4e975c9e4a6267a552dad3b24a https://git.kernel.org/stable/c/fec5c70b82af3f59f15bb984df94e5ad1fccfb1e https://git.kernel.org/stable/c/3fe2d9ec166b7df9a8df6c0fdcfc210572e27e3f https://git.kernel.org/stable/c/407cc37c21d51f9b9d4d20204b04890880cfa6ae https://git.kernel.org/stable/c/c6b01b997a2094969e315f1ebfc1d64b8ae2163d https://git.kernel.org/stable/c/441336115df26b966575de56daf7107ed474faed