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 4ACF44F6490 for ; Wed, 16 Sep 2026 10:44:50 +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=1789555504; cv=none; b=sKIP3o2VXuo8dGSiqvYxx0eq1p3xwMlufpW4pX6XB6aEQ1Dqrsh61yMpK5WmM2WmGqdjLs8p8I9Q1JiSXOMqcbH2ZUFSR2uchiAFo2zBWk4bBJPmGzLLxDw+NrgoR8BeeqvCpLMRMymsjYOZh4AbNh9BvP4NF+Z1V+xSfiqUiWs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789555504; c=relaxed/simple; bh=lugGPaefrKhDVTiOiaBmxaCjyDuBtRH+pGGUFZnRHfI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=GKp72aZEdSvNMM+tcBeyAGe6cWo0pvcbxq2YQyTh/nAMO/1lrE+VfZB9BwZv90JsOFPQRrtAhjsEi/RP+IyF9TtKG+3DGNmtxVNAkC6oR0Vw8jLc9niKqs3hD4c1V+ie0Vv471gFVmIA70piEAdtBem1inBIuvhhb3BZK/KNEL0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pK9mf/Zy; 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="pK9mf/Zy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 073B71F00898; Wed, 16 Sep 2026 10:44:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789555486; bh=Xs1IO2ZjMrnxBa/sL8fRlNrtssudm7rw4zJWitSLJDQ=; h=From:To:Cc:Subject:Date:Reply-To; b=pK9mf/ZyaojlRrtqZWQv7qxXHvalWsh/9kn4br/oM9s2IZHUqPjaxqCW4YUuWpkA3 Iu1i6JiDyGf0ZJK3h9MS36oJCYHEJssgVMYZ6OaWz4XOO+qan6CNMeg4EmrEeGCoAE EOFwE9nGPI2RtMoxt5rGVxlze1NL9neS6Pyz4OEY= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-90033: ALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output() Date: Wed, 16 Sep 2026 11:32:43 +0100 Message-ID: <2026091606-CVE-2026-90033-c545@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=3789; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=86uJQKhlvp6EKGMaxpM4bKqUiVWV5m4Xo39ff5efi8Y=; b=owGbwMvMwCRo6H6F97bub03G02pJDFmr8tddmrdCI4PLfGoAU97JxV27Mq+si4y5LKEqMlX6Z FNJw8bvHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjARnmqGuVJul61ners7pNfu Ot7yxczy5KrX2xgW3DzDzyvAnGN6yPLyu7PFh5w8Q152AwA= 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: ALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output() The snd_usbmidi_us122l_output() picks a count of 2 on anything slower than high speed and never relates it to ep->max_transfer. The URB buffer holds exactly max_transfer bytes, so a device declaring a one byte bulk endpoint takes two bytes from snd_rawmidi_transmit(), and the memset that pads the rest computes 1 - 2 in int and wraps to SIZE_MAX. Only 0x800e and 0x800f are pinned to nine bytes. The US-122MKII at 0x0644:0x8021 falls to the default and takes usb_maxpacket(), which the USB core only clamps downward. The akai and novation output ops in this file were given the same guard recently. Do the same here. The Linux kernel CVE team has assigned CVE-2026-90033 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.28 with commit 030a07e441296c372f946cd4065b5d831d8dc40c and fixed in 5.10.270 with commit 5538daf2a5cc80ac3f3e913c0db045d92d995d40 Issue introduced in 2.6.28 with commit 030a07e441296c372f946cd4065b5d831d8dc40c and fixed in 5.15.221 with commit a441a8e52148c91c2f2a91f42e3b9bc961a13a4b Issue introduced in 2.6.28 with commit 030a07e441296c372f946cd4065b5d831d8dc40c and fixed in 6.1.188 with commit 2dae0e3a59e31f78222279d544b98e747cd1fbff Issue introduced in 2.6.28 with commit 030a07e441296c372f946cd4065b5d831d8dc40c and fixed in 6.6.157 with commit 1d4add2b832b56f81bb0eab065ec35c610343018 Issue introduced in 2.6.28 with commit 030a07e441296c372f946cd4065b5d831d8dc40c and fixed in 6.12.110 with commit de6d252f115be887a701c09a05cdb076f3a590c9 Issue introduced in 2.6.28 with commit 030a07e441296c372f946cd4065b5d831d8dc40c and fixed in 6.18.51 with commit 9392a2c346762ffee8edd1ba8bac50d2e24a2ed7 Issue introduced in 2.6.28 with commit 030a07e441296c372f946cd4065b5d831d8dc40c and fixed in 7.2.5 with commit 9d81885d97cba7796d1f8edc88f2499c8296f5b9 Issue introduced in 2.6.28 with commit 030a07e441296c372f946cd4065b5d831d8dc40c and fixed in 7.3-rc2 with commit e4637ce34607f1733a34a57294966d26b263e626 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-2026-90033 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: sound/usb/midi.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/5538daf2a5cc80ac3f3e913c0db045d92d995d40 https://git.kernel.org/stable/c/a441a8e52148c91c2f2a91f42e3b9bc961a13a4b https://git.kernel.org/stable/c/2dae0e3a59e31f78222279d544b98e747cd1fbff https://git.kernel.org/stable/c/1d4add2b832b56f81bb0eab065ec35c610343018 https://git.kernel.org/stable/c/de6d252f115be887a701c09a05cdb076f3a590c9 https://git.kernel.org/stable/c/9392a2c346762ffee8edd1ba8bac50d2e24a2ed7 https://git.kernel.org/stable/c/9d81885d97cba7796d1f8edc88f2499c8296f5b9 https://git.kernel.org/stable/c/e4637ce34607f1733a34a57294966d26b263e626