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 79DF93E7148 for ; Fri, 8 May 2026 14:23:02 +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=1778250182; cv=none; b=jDBndIwvHLXvpfnwWpYvv+LwEtSDEts307L4Z64PXog5wGo3vGWOGn8k1M+jki5TgkEBnoDtLzseNG7mYaLDQqD5jWhpbuLTVd0GXfOPKr5a3MNwxRsimIMoFicjOHl+61nu8t97gsJWZWxc6F7XfJHVUCbTY7DBSYg8b8f30II= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250182; c=relaxed/simple; bh=ChBJzgpRLp6VYTRb19IAU/uXUApcjxPdgI6CXty7ZVU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=jV3/zXuBWXX4KUps2F054cxV0wz7TVlmG/48Qx4nuYB6ZUS+Px+3z4Kpgr5DPxmiZb8N3/Tkb+/Y6Kb2kXcLU66R6iYlAopvmkWYGTabfBOdfmf1ISQpTt7TpAtoBel0b21Zy8E8Xfd2MNzP4F09TEF6cNncgQmxgOHeuog7KSo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QLGckWL+; 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="QLGckWL+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C5610C2BCB0; Fri, 8 May 2026 14:23:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250182; bh=ChBJzgpRLp6VYTRb19IAU/uXUApcjxPdgI6CXty7ZVU=; h=From:To:Cc:Subject:Date:Reply-To:From; b=QLGckWL+tACvcY9+P05MloOG9YKEYuFBG0YUb+/YXAc5uHoVLIOuFc+8lPgLkRZxc wS2Inen/1AcFn+ylAwlRJU5m4BsKvPc1ob3UmBnDr/jRaEzIX1E6La8XZAL6cCqWjl /oTOLmmILZYMu4T2jV237wpiLbzFTcN7peTn5t/E= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43375: net: mctp: fix device leak on probe failure Date: Fri, 8 May 2026 16:21:44 +0200 Message-ID: <2026050831-CVE-2026-43375-394d@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=2507; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=UBx1wen/VYvMRnVFzdrjb/cMr1p8NIV56OIWFhSf+kM=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/P2aXrb702iEkomHN3Jer9iUFhqpXSZnk31K4yHOx4 /M2B27ujlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZjI8SqGBVcqfp72Cw4JmhM/ 5/zT1UqFn3OFnRjme3q47zo6SX/2gcZn92Z7fTpicCI6BQA= 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: net: mctp: fix device leak on probe failure Driver core holds a reference to the USB interface and its parent USB device while the interface is bound to a driver and there is no need to take additional references unless the structures are needed after disconnect. This driver takes a reference to the USB device during probe but does not to release it on probe failures. Drop the redundant device reference to fix the leak, reduce cargo culting, make it easier to spot drivers where an extra reference is needed, and reduce the risk of further memory leaks. The Linux kernel CVE team has assigned CVE-2026-43375 to this issue. Affected and fixed versions =========================== Issue introduced in 6.15 with commit 0791c0327a6e4e7691d6fc5ad334c215de04dcc9 and fixed in 6.18.19 with commit 3224990fb16a831aabc50b67c74f5d0074ce80dd Issue introduced in 6.15 with commit 0791c0327a6e4e7691d6fc5ad334c215de04dcc9 and fixed in 6.19.9 with commit ec9538f9b5cd1db5e8c612aa636b6119b6355c5d Issue introduced in 6.15 with commit 0791c0327a6e4e7691d6fc5ad334c215de04dcc9 and fixed in 7.0 with commit 224a0d284c3caf1951302d1744a714784febed71 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-2026-43375 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: drivers/net/mctp/mctp-usb.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/3224990fb16a831aabc50b67c74f5d0074ce80dd https://git.kernel.org/stable/c/ec9538f9b5cd1db5e8c612aa636b6119b6355c5d https://git.kernel.org/stable/c/224a0d284c3caf1951302d1744a714784febed71