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 052D13EDAB3 for ; Fri, 8 May 2026 14:25:33 +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=1778250334; cv=none; b=nISpPQ3Kl1FZ/sotid/0iu0rHJlh2D5JjFY+aGUwQVzrA3/+L9A1WBAEWCr/D4f/T1rkGGTKjILG+0aOu60uKPkTK4AK6K3SzHjV0O+lFIc1y+MktdCb//Cx3nzbptHuWDkRBXLI8p9qaVlFhT2YsoPV69ehDZkQgWmtrqWsT/Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250334; c=relaxed/simple; bh=Hvw2PoV70l9JYaUqEbMmWrcv5ecftsWOxeah91HphdY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=QcsTwZYeyj4gms3CM10mX3TdAXMq34a3+5COv2aXiWY6Y1bIutxlQ+yC9tDt1ljciaobIeP1HwpiCVneB1kbgSk0SMeJQAjxv5XEfQSPzdvAxzPeTsqR8SbM94KcbjenP/w1Poh8PFzwUa3meyIblzxIL4uYbeNyUUVQ2TyBLh4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UHk5YAac; 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="UHk5YAac" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F9FBC2BCB0; Fri, 8 May 2026 14:25:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250333; bh=Hvw2PoV70l9JYaUqEbMmWrcv5ecftsWOxeah91HphdY=; h=From:To:Cc:Subject:Date:Reply-To:From; b=UHk5YAacRea+2m1pqu5sUGMDi93o7IUZ/db5vOwlRvUA2k0UQ8Mcdn0+SJXJ0m5eH 7FD5t0sLBtNdk/x+jh5773VC36X5qC69SMb/yIDpm3+POKDzx2XttM9vJn4XQk5yS5 9Om90zNmx5aNdw5PrRUtlYwRW+TglVQ8Nz5BTciI= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43436: ALSA: usb-audio: Check endpoint numbers at parsing Scarlett2 mixer interfaces Date: Fri, 8 May 2026 16:22:45 +0200 Message-ID: <2026050852-CVE-2026-43436-9469@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=2569; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=A397TTWSzP4NF1ps2DaxtXINU6zlSeKQw/qjbc1cHTA=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/PzaYpIVY/Q2OkDgf+PFIIW9PYPbstfnbJwv4qb7Zv U5nBaNnRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAExkshbDHF5ThhvGIm2r3ofu ED39TPZKkeS23QwLZir0PErfq8jq416QO3PiXc2Tzsy8AA== 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: Check endpoint numbers at parsing Scarlett2 mixer interfaces The Scarlett2 mixer quirk in USB-audio driver may hit a NULL dereference when a malformed USB descriptor is passed, since it assumes the presence of an endpoint in the parsed interface in scarlett2_find_fc_interface(), as reported by fuzzer. For avoiding the NULL dereference, just add the sanity check of bNumEndpoints and skip the invalid interface. The Linux kernel CVE team has assigned CVE-2026-43436 to this issue. Affected and fixed versions =========================== Fixed in 6.1.167 with commit b014cc945baba75816cda0cf8934be87c9ed4947 Fixed in 6.6.130 with commit c5c5a6c53cf3b658f1d4512dfa61f3cd25bc34ba Fixed in 6.12.78 with commit b267255c15d2a5b90c4e926146aa155e5161e264 Fixed in 6.18.19 with commit 3d542cf3c4c854cdf5d58049771f68926b9eb2b9 Fixed in 6.19.9 with commit 3d4f23885e4b90347c9a1d779af6e79a99b5172a Fixed in 7.0 with commit df1d8abf36ca3681c21a6809eaa9a1e01ef897a6 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-2026-43436 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/mixer_scarlett2.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/b014cc945baba75816cda0cf8934be87c9ed4947 https://git.kernel.org/stable/c/c5c5a6c53cf3b658f1d4512dfa61f3cd25bc34ba https://git.kernel.org/stable/c/b267255c15d2a5b90c4e926146aa155e5161e264 https://git.kernel.org/stable/c/3d542cf3c4c854cdf5d58049771f68926b9eb2b9 https://git.kernel.org/stable/c/3d4f23885e4b90347c9a1d779af6e79a99b5172a https://git.kernel.org/stable/c/df1d8abf36ca3681c21a6809eaa9a1e01ef897a6