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 ECFE3438FF2 for ; Wed, 6 May 2026 11:36:35 +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=1778067396; cv=none; b=U5wrVQJ/HgpM/6Mm+eFAtKHE//uMlHIy23W63XkaqRu+3M9ntnUPNsP88nA83nR/mscJ1nw9dbVTs9E97w5nsxHt8WNIuua0F9vkcoXXRyM4ucNzuGH5pKpLk4qloaAVoi2fErxPFBGYO9plU1muWrWN/qV1YZXBsiL8dzHrkC0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778067396; c=relaxed/simple; bh=QC7XKseJmuskFSyS8N+J9nKr1yqMNl6+SP5ydFQo16A=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=GEe3JCQRH9Bhd7Q4MWg0piPW32yAIx4BIsF2/TDODW9a+dPL7N2/vJFU4OajPxiKudBJ84dNdnTAn7s8fwPLHxQgLxCli+qqhMXTmzFaH1vdqYgFAKtQ8sDXKc7ZROTMKgZBWdTSEKpIQ/qMGTu/VIxEtjnJQw5uQZtbMk++Mz0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=kPZiFzEa; 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="kPZiFzEa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8343DC2BCB8; Wed, 6 May 2026 11:36:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778067395; bh=QC7XKseJmuskFSyS8N+J9nKr1yqMNl6+SP5ydFQo16A=; h=From:To:Cc:Subject:Date:Reply-To:From; b=kPZiFzEakVJgQUBWn2I4aZmyFVnQ5/Q2wSsmp/d8Y5GMClXyViGVa0p4wZaEIqByH JjJPqSsr4C+MXTkLtyW6HexGaTemva7MuXwHu5oqcT/S9CTdQfa4nsR8zYj70/VXRl W+A7JcF+Xdg+ofq1XkVwJQ1tXNBtt5kKHXuLELNE= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2025-71285: net: qrtr: Drop the MHI auto_queue feature for IPCR DL channels Date: Wed, 6 May 2026 13:32:30 +0200 Message-ID: <2026050630-CVE-2025-71285-4521@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=3700; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=S2/iJKb2pQ94ml5qXnyLi1N2DV0YvZY5IegU/szjvBQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDJm/1c4xzXvZHfrzdk6Nec5KXl6RyRtPpyYe6HWPn2PmK 327nWtKRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAExkhQ7D/PimNYWTnL/qCMXz TP3n/yX+62oJEYZ5BqUBd1Wls3OOtuj2VC951PZP27MPAA== 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: qrtr: Drop the MHI auto_queue feature for IPCR DL channels MHI stack offers the 'auto_queue' feature, which allows the MHI stack to auto queue the buffers for the RX path (DL channel). Though this feature simplifies the client driver design, it introduces race between the client drivers and the MHI stack. For instance, with auto_queue, the 'dl_callback' for the DL channel may get called before the client driver is fully probed. This means, by the time the dl_callback gets called, the client driver's structures might not be initialized, leading to NULL ptr dereference. Currently, the drivers have to workaround this issue by initializing the internal structures before calling mhi_prepare_for_transfer_autoqueue(). But even so, there is a chance that the client driver's internal code path may call the MHI queue APIs before mhi_prepare_for_transfer_autoqueue() is called, leading to similar NULL ptr dereference. This issue has been reported on the Qcom X1E80100 CRD machines affecting boot. So to properly fix all these races, drop the MHI 'auto_queue' feature altogether and let the client driver (QRTR) manage the RX buffers manually. In the QRTR driver, queue the RX buffers based on the ring length during probe and recycle the buffers in 'dl_callback' once they are consumed. This also warrants removing the setting of 'auto_queue' flag from controller drivers. Currently, this 'auto_queue' feature is only enabled for IPCR DL channel. So only the QRTR client driver requires the modification. The Linux kernel CVE team has assigned CVE-2025-71285 to this issue. Affected and fixed versions =========================== Issue introduced in 5.17 with commit 227fee5fc99eeb74d43bf68832f6d59d30ac07d8 and fixed in 6.18.17 with commit 7bdff9b9b0c65ac7105416fe3a40686832515e20 Issue introduced in 5.17 with commit 227fee5fc99eeb74d43bf68832f6d59d30ac07d8 and fixed in 6.19.6 with commit 8c464e00e0754e016816b1860fa9592dcad80eb2 Issue introduced in 5.17 with commit 227fee5fc99eeb74d43bf68832f6d59d30ac07d8 and fixed in 7.0 with commit 51731792a25cb312ca94cdccfa139eb46de1b2ef Issue introduced in 5.15.63 with commit c682fb70a7dfc25b848a4ff3a385b0471b470606 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-2025-71285 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/accel/qaic/mhi_controller.c drivers/bus/mhi/host/pci_generic.c drivers/net/wireless/ath/ath11k/mhi.c drivers/net/wireless/ath/ath12k/mhi.c net/qrtr/mhi.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/7bdff9b9b0c65ac7105416fe3a40686832515e20 https://git.kernel.org/stable/c/8c464e00e0754e016816b1860fa9592dcad80eb2 https://git.kernel.org/stable/c/51731792a25cb312ca94cdccfa139eb46de1b2ef