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 245DA1F0991 for ; Mon, 27 Jul 2026 20:10:59 +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=1785183061; cv=none; b=W/NcNEoLG/zmwYVdObp0kgx8CRygfxZcyITNqK65zV1rG90ri7r1s/T/jyo1pXHU/NUjSVCAVIu+uvJdo3rdljQ37CVDEpFpUSHVw0Wfau+CvWDiGtRHEoJQ20n2UlL94wh76QdT11aH/93/5VKkvhH661ffsbSdAlXRWk8lof8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785183061; c=relaxed/simple; bh=ZQax1debPNLH0j9OwywkMtiZ3eenFHT9qCkm2yO9i78=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=dEVwrFJXdgcjdi9taqg/gowDMrEeW1d1rwYAE+hIWIh8i6sRB8fQHpVmqLfw8pTwGaRnBrHLVc2cnjSkjlAz7oSy4DIRjHHaI3BLjT4X9B62zcoC3Xe3HwL+Bb7qKtPa3XRomB0TycWTjPUTTxnqMY2GPUOQHs6+RFuCHogZMwQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Gy2bXTIK; 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="Gy2bXTIK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2EF751F000E9; Mon, 27 Jul 2026 20:10:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1785183059; bh=c3FODU5MMgKIa5wjLXgQOMwJ29MnaPP4UDVGQZS5Cwc=; h=From:To:Cc:Subject:Date:Reply-To; b=Gy2bXTIKTBgujYtGLQkgHT1fu4IBRF+gm/JYewu2KAhjwd06QmkaFOiS8PfwgcrT6 zq7nyvFLPyYRtqu5ewo4wP4oEhWB5mRcwwa3nzbKdyaYa7lFIUkwl4s1mvXDKkt/lP TtkyltPcQh9ZGyS+uxGo1CUI8uFOIl/Dzy8GSPPM= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-64547: net: usb: net1080: validate packet_len before pad-byte access in rx_fixup Date: Mon, 27 Jul 2026 22:10:45 +0200 Message-ID: <2026072736-CVE-2026-64547-4deb@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=4006; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=gDIQTa6UzhNWmo/RhecJXq9q5R0imF6x5RmQ6VPuA2k=; b=owGbwMvMwCRo6H6F97bub03G02pJDFnpu233m1UEZkSm+EhnZNYJnIpayvf20bKLjIcVPgi3r 7OXa/btiGVhEGRikBVTZPmyjefo/opDil6Gtqdh5rAygQxh4OIUgIk8esKwYEnWMsm+DcVR38Sv M2yNS1pzx5O/gmHBTpnT8aUazdPvGP54KvU0orLgxrpmAA== 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: usb: net1080: validate packet_len before pad-byte access in rx_fixup For an even packet_len, net1080_rx_fixup() reads the pad byte at skb->data[packet_len] before the skb->len != packet_len check further down, and packet_len is only bounded against NC_MAX_PACKET. A malicious NetChip 1080 device can send a short frame advertising a large even packet_len (e.g. 0x4000), so the pad-byte read lands past the end of the skb: BUG: KASAN: slab-out-of-bounds in net1080_rx_fixup Read of size 1 at addr ffff8880106c83c6 by task ksoftirqd/0/14 ... net1080_rx_fixup (drivers/net/usb/net1080.c:384) usbnet_bh (drivers/net/usb/usbnet.c:1589) process_one_work (kernel/workqueue.c:3322) bh_worker (kernel/workqueue.c:3708) tasklet_action (kernel/softirq.c:965) handle_softirqs (kernel/softirq.c:622) ... Reject the frame when packet_len >= skb->len before reading. The Linux kernel CVE team has assigned CVE-2026-64547 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.14 with commit 904813cd8a0b334189da285bb05af0b18b062502 and fixed in 5.10.261 with commit f42217fa7d535e9ec4151f7971f06f6ea65e850a Issue introduced in 2.6.14 with commit 904813cd8a0b334189da285bb05af0b18b062502 and fixed in 5.15.212 with commit c087749815379e9af2fdbeb08bfc33870b103958 Issue introduced in 2.6.14 with commit 904813cd8a0b334189da285bb05af0b18b062502 and fixed in 6.1.178 with commit e4a87126c085b097d29e17e3b7647295bba8be7c Issue introduced in 2.6.14 with commit 904813cd8a0b334189da285bb05af0b18b062502 and fixed in 6.6.145 with commit 685e92934f11d5e215dad58813e2f9955ac2f436 Issue introduced in 2.6.14 with commit 904813cd8a0b334189da285bb05af0b18b062502 and fixed in 6.12.97 with commit 4dc8484be3302d187274364820d3bef6c62bde32 Issue introduced in 2.6.14 with commit 904813cd8a0b334189da285bb05af0b18b062502 and fixed in 6.18.40 with commit b153cfe84b1340c69a13d0957665a2bfcf21239c Issue introduced in 2.6.14 with commit 904813cd8a0b334189da285bb05af0b18b062502 and fixed in 7.1.5 with commit ea866cab12db1a2100b400a8b03569e5bc0ee29a Issue introduced in 2.6.14 with commit 904813cd8a0b334189da285bb05af0b18b062502 and fixed in 7.2-rc3 with commit 03f384bc0cb8d4a1301d4f5b0baef2d980258383 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-2026-64547 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/usb/net1080.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/f42217fa7d535e9ec4151f7971f06f6ea65e850a https://git.kernel.org/stable/c/c087749815379e9af2fdbeb08bfc33870b103958 https://git.kernel.org/stable/c/e4a87126c085b097d29e17e3b7647295bba8be7c https://git.kernel.org/stable/c/685e92934f11d5e215dad58813e2f9955ac2f436 https://git.kernel.org/stable/c/4dc8484be3302d187274364820d3bef6c62bde32 https://git.kernel.org/stable/c/b153cfe84b1340c69a13d0957665a2bfcf21239c https://git.kernel.org/stable/c/ea866cab12db1a2100b400a8b03569e5bc0ee29a https://git.kernel.org/stable/c/03f384bc0cb8d4a1301d4f5b0baef2d980258383