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 64362383983 for ; Tue, 6 Oct 2026 10:28:06 +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=1791282487; cv=none; b=g6ercT6x19n5wbcrvV9xOnk6KeslzOcerxcaJD691FLSF0pi5j+m//t8XBvJ3SFfrLiGUsnND9CzU6hn4ddVyPXqbR8F3wVDL0QF51oIXkVcNY1JJbZKX6lJkSedwYahIoryyS72fG66MEGFKr44myrprVvnnT5osNb4/Uy2EdE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791282487; c=relaxed/simple; bh=trLw6AVGWz48Dw6+pbCtWBp76CCT5EJIDpj1GEMg4Pw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ZXW+9l+vmT5QHSso1DIBw/L2z/S1epGOYIq0lwYvswT20P/xq+i550c7gpXDmuWsEfiTM7D7q2AvKUiZw5bVAeB7b5a2RDwepCi3V0tpxroejKp/+6ugBMjsUSNREGb48+ItXfvMH0zHhuRtcnsTkxpMljRKreHRXHjy3OrQdfE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=siN2dL8O; 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="siN2dL8O" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C5D371F000FF; Tue, 6 Oct 2026 10:28:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1791282486; bh=b04Kyv1O1R7T49U12w/R4Zl6TGbsN1fVyPUelJmcDBc=; h=From:To:Cc:Subject:Date:Reply-To; b=siN2dL8OrWezpg9eeODYwr0tSuBW851P2TVQzudHZtsbG2T9lrE9wHcaCQld3/VMW nDGN0wfvwb77KvfRJpZ+d+Y760112SvTzolfPXlhMYlTgphwNk2bRzNmcqY7xtP5lP Z+VaxTWOyISvelaam2H/EI+k7ZDq0cyALnFjKrlY= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-98290: Bluetooth: RFCOMM: avoid socket lock inversion in listener cleanup Date: Tue, 6 Oct 2026 10:46:31 +0200 Message-ID: <2026100606-CVE-2026-98290-e7bb@gregkh> X-Mailer: git-send-email 2.56.0 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=3813; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=2IGB40thRDcGqg/kfF3lSREnnz/mo8aW3Q5TR0fnWYY=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlHtgpPdzaS//D+hWX+h8Xtu451ueqdv/bK8lRUf/Q0L 8bpfXu+dcSyMAgyMciKKbJ82cZzdH/FIUUvQ9vTMHNYmUCGMHBxCsBEImQYFhw0ST3cNMNRf97q pDnGKydLPPwqZ8Sw4Jqxsmi+8QrjdM+2F2eZ/8Q9te6RAQA= 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: Bluetooth: RFCOMM: avoid socket lock inversion in listener cleanup rfcomm_sock_cleanup_listen() closes unaccepted child sockets through rfcomm_sock_close(), which takes the child socket lock before rfcomm_dlc_close() acquires rfcomm_mutex. The RFCOMM worker takes these locks in reverse order while handling connections and DLC state changes, so lockdep reports a possible deadlock. Close dequeued children without taking their socket lock. The accept queue owns a reference to each child, and bt_accept_dequeue() locks the child while unlinking it and clearing its parent pointer. Dropping the child lock makes it important to prevent a concurrent rfcomm_connect_ind() from enqueueing a new child after cleanup observes an empty queue. Set a listening socket to BT_CLOSED while its lock is still held, before dropping the lock and draining the queue. The state check in rfcomm_connect_ind() then rejects new children once cleanup starts. The Linux kernel CVE team has assigned CVE-2026-98290 to this issue. Affected and fixed versions =========================== Issue introduced in 5.15 with commit b7ce436a5d798bc59e71797952566608a4b4626b and fixed in 5.15.222 with commit eb4adaa46e4c9e6efa7be3ce06398f4d7c39b57c Issue introduced in 5.15 with commit b7ce436a5d798bc59e71797952566608a4b4626b and fixed in 6.1.189 with commit 4aafb47301a799d3e01230d6568c4e93524e1523 Issue introduced in 5.15 with commit b7ce436a5d798bc59e71797952566608a4b4626b and fixed in 6.6.158 with commit c741977e413f5b49d306700820fb55ccb8269f5a Issue introduced in 5.15 with commit b7ce436a5d798bc59e71797952566608a4b4626b and fixed in 6.12.112 with commit c6792c441767256030606eb82dca5d5fc360dd9a Issue introduced in 5.15 with commit b7ce436a5d798bc59e71797952566608a4b4626b and fixed in 6.18.54 with commit bfce253f039eb5f58b810af267942a9f59207254 Issue introduced in 5.15 with commit b7ce436a5d798bc59e71797952566608a4b4626b and fixed in 7.2.8 with commit 18174b166547ef41973cc19feb5ef9cab39a8def Issue introduced in 5.15 with commit b7ce436a5d798bc59e71797952566608a4b4626b and fixed in 7.3-rc4 with commit 801fb950cae7048eb7d83b18857d1ca37b8cd5a4 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-2026-98290 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: net/bluetooth/rfcomm/sock.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/eb4adaa46e4c9e6efa7be3ce06398f4d7c39b57c https://git.kernel.org/stable/c/4aafb47301a799d3e01230d6568c4e93524e1523 https://git.kernel.org/stable/c/c741977e413f5b49d306700820fb55ccb8269f5a https://git.kernel.org/stable/c/c6792c441767256030606eb82dca5d5fc360dd9a https://git.kernel.org/stable/c/bfce253f039eb5f58b810af267942a9f59207254 https://git.kernel.org/stable/c/18174b166547ef41973cc19feb5ef9cab39a8def https://git.kernel.org/stable/c/801fb950cae7048eb7d83b18857d1ca37b8cd5a4