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 C438745517D for ; Thu, 17 Sep 2026 16:26:25 +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=1789662387; cv=none; b=HqRCGPISbvNizjPHGJ0Wdw1jAYC/E055tNpI1eyec+QTpBrwVwVKwooe5nCpy6EtovVIi7Xj5cmyFB3bYTQ2SAx/CJL/MRhaQsDbk7UZBiuUMIvTa14ePNIWzm2aG37ibkYVvMGPichOQZ7oMrVZ+hVNhqMz0G6FBxpW5WOuEnI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789662387; c=relaxed/simple; bh=3QTAdkfb5JIlvVmgxpiNgdek61SJ3qIOPzce+00cdVc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=bXiWl8CRTCe4d5KH6wo+kMhEC0KlOuQlJ9OoqStxt8UOfvNYB37fsDI+EN3rUnoKJAS/IuvPFO1CuLxgTWnPqod/gRfRVp7vKklLTkvxmgHnDtdhoXzzitYmid4ncavFxbaLWviy10l6a0Lcrxeo2jMgKWUX2yTSRkVDspXdnjw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YtbYxlLV; 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="YtbYxlLV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27FCF1F00893; Thu, 17 Sep 2026 16:26:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789662385; bh=gSnzQalpM5U/8aMoDKKYyX41yy8GSpBV5+wSlkWTnVk=; h=From:To:Cc:Subject:Date:Reply-To; b=YtbYxlLVyD/sl4tF6bWaFGWkauIn9dRR+AXxyGI4hYmI/dRcztc4j1VmafISt8Lyw BkBOnCkJeTcoJocU97YF8jVt4ZkF5EAxKisXAs/YoUrWy7R3uM5AUJ+Td2Y/gg/tvg M6z5x1/Z5XqlFh0emZDAytUYi9Zwv0n8S34jXqWo= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-90337: serial: core: do fallible allocations before the console can be registered Date: Thu, 17 Sep 2026 17:12:47 +0100 Message-ID: <2026091701-CVE-2026-90337-3c19@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=2471; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=sXzuYyZlKgGEJt7Gzs4fyqtsRVL+ZpJZ/Bgnsh7qwRg=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlrBOZubHfISuwMO9C3h2NfjNON5Du/BXb8+l92x2um8 Kdm29qVHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCRZ/MYFpz8NpP3Cnfc8TDV 808+XXY5srvkXzfDgk2xdSbv5hab+wVbrszJt/LyP15iAQA= 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: serial: core: do fallible allocations before the console can be registered serial_core_add_one_port() allocates uport->tty_groups after uart_configure_port(), which may register the console. If the allocation fails, the driver unwinds the port while its console remains registered. The earlier uport->name allocation has a related failure path that leaves state->uart_port linked to a port being freed. Failslab reproduced a NULL dereference in PL011 console output and a KASAN use-after-free in i.MX console output after failed binds. Allocate the name and tty_groups before linking the port and configuring it. Reserve space for the optional driver attribute group because config_port() may populate uport->attr_group during configuration. The Linux kernel CVE team has assigned CVE-2026-90337 to this issue. Affected and fixed versions =========================== Issue introduced in 3.17 with commit 266dcff03eed0050b6af11aaf2a61ab837d7ba3f and fixed in 7.2.6 with commit c2aec15f78b2e6ccd9b94216a901248511355982 Issue introduced in 3.17 with commit 266dcff03eed0050b6af11aaf2a61ab837d7ba3f and fixed in 7.3-rc1 with commit 1a0e4fbce5d9c1bc179a35a2fd9ed142664299e3 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-2026-90337 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/tty/serial/serial_core.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/c2aec15f78b2e6ccd9b94216a901248511355982 https://git.kernel.org/stable/c/1a0e4fbce5d9c1bc179a35a2fd9ed142664299e3