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 840803A5E8F for ; Mon, 10 Aug 2026 11:52:44 +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=1786362765; cv=none; b=B5vvypKvnxs67hyHjj4F5XVxve3YeEHVgjsspvqe/+uGFc5BRIBIdyEz+QpKXFbn34AdOyM5192dW+lDvQjpFSZurMcahjdqjxQweV2zRz+PynHB8zPLSVJyctNOVQ6KVzouy7jvvw0UCv3t1spj33cQdilaHujZASwhYmeLwBs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786362765; c=relaxed/simple; bh=62eEvpYZNPXQ+BzXxGZP52Gq7DTPHWgbvt/beWgFqMU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=Vql/pgTxv4XroKApQsS4WMzvJAgig4v/jyOahJJmcgs6YzXF1pPvD41/J+Eu88AF9ZWDcC1QetS7XjZtPlH/UmD6NXp54tR030U1zVdnJdZxEEGIXkIOqVYFXgmBfn4flsrziD+exeylcwWIxqq2qwokuUKO7jpchG2uPiu3H/4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wXi/ZNUi; 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="wXi/ZNUi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2FE71F000E9; Mon, 10 Aug 2026 11:52:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786362764; bh=wnhLj+dIfgczPB5VGM0RfPYee8VSqjH7J02f6NmmiVY=; h=From:To:Cc:Subject:Date:Reply-To; b=wXi/ZNUiKBTMMngoB1A0W0YLsWV2CVLejOHFjejvK9gK7DoiskHoo+vP4yYNC87Eo W1GQ+lBR9rO0Bidk8B1JvI05G8HM8rZ6fOQJ0SVLsQNTyIEa7c5QRk66sPZHmTG9oU RYAF+8O4Cj2sHOAWqMb+APWwjzL+LSr6BIHlQYzA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-68087: HID: wacom: use GFP_ATOMIC in wacom_wac_queue_flush() Date: Mon, 10 Aug 2026 13:50:58 +0200 Message-ID: <2026081059-CVE-2026-68087-18c0@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=2469; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=bodk2dfe3+SDA9FZB4ZDCbt+xXihYLWXd6o3gKadXyY=; b=owGbwMvMwCRo6H6F97bub03G02pJDFmVu5W3HDQLf+kwN3LdmQ8SVy4J9oT5KKnteXRuruGxz orOCRPlOmJYGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAirbwM0yNnuPLzdN9RXlkp eNV/Yecc/v2uDAum2whM6tX9I1Fn/Hu9ttHp54GsnsIA X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: HID: wacom: use GFP_ATOMIC in wacom_wac_queue_flush() wacom_wac_queue_flush() is called via the .raw_event callback (wacom_raw_event → wacom_wac_pen_serial_enforce → wacom_wac_queue_flush). For USB HID devices, this callback is invoked from hid_irq_in(), which is a URB completion handler running in atomic context. Using GFP_KERNEL in this path can sleep, leading to a "scheduling while atomic" bug. Use GFP_ATOMIC instead. The existing code already handles allocation failure by skipping the fifo entry and continuing. The Linux kernel CVE team has assigned CVE-2026-68087 to this issue. Affected and fixed versions =========================== Issue introduced in 6.15 with commit 5e013ad206895e72d7da41bc1ae89d8cb499c3aa and fixed in 6.18.39 with commit bbe1e55629bfaabd4b2e8125b48dd3503d74ac8b Issue introduced in 6.15 with commit 5e013ad206895e72d7da41bc1ae89d8cb499c3aa and fixed in 7.1.4 with commit 27c4dad1b7917b747bf080792a527997e3147c69 Issue introduced in 6.15 with commit 5e013ad206895e72d7da41bc1ae89d8cb499c3aa and fixed in 7.2-rc1 with commit 55f1ad573e34abf9a0443c34bc5a63d74edba7d7 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-2026-68087 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/hid/wacom_sys.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/bbe1e55629bfaabd4b2e8125b48dd3503d74ac8b https://git.kernel.org/stable/c/27c4dad1b7917b747bf080792a527997e3147c69 https://git.kernel.org/stable/c/55f1ad573e34abf9a0443c34bc5a63d74edba7d7