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 5009F4279E2 for ; Wed, 4 Feb 2026 16:21:56 +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=1770222116; cv=none; b=jwpz+28Qq0p2CZavN6U/YyTK/LFMjSQDWogJ4Xr2riia3HvxV6vyz599pdEegXQvAGl/CvBNgyk3ZYrtwbrKTaHa+u8K6UTRHgtIo7i5WmFfBrZo62sxRvnvS++98/sYQMllCcXGDzjn+AdmRnCT6S9zU2uZHlajNs9EpdTJI0o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770222116; c=relaxed/simple; bh=tvScnxAovZh5HUZGOB7qzudutHX0Cxcb7WOtrT7s2Xg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=n0+OtWDttOsST3KAtE0NQ3+HFUT/6tqLBOjZ6kxG0CUiV+eSzF0g+3ZWzSxGc05Se4uJZ1KMjsxDkH9PsT62LT7ulDUIxsyJdesENwWiQn490u5K2hQysaiWiEmNIjOcpjzlS/xKZxQxEFjuzbrA25NEdBsGkHM9Ws4wU9FlLj4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WBZUGHKL; 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="WBZUGHKL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B4707C4CEF7; Wed, 4 Feb 2026 16:21:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1770222116; bh=tvScnxAovZh5HUZGOB7qzudutHX0Cxcb7WOtrT7s2Xg=; h=From:To:Cc:Subject:Date:Reply-To:From; b=WBZUGHKLUv807QQQg7U/8gWhlb1cvFo9HQfwkRTzYD2t+CfckKuQ3w5O51k02X2YH Dx7FS80/WJaBiKBYWmi1KPaK/hEPShc1xz0XFcPcgM9mjbO2pGaa4aARSeK+JICP/C Dv6dbDdgY+BHfrBre9m8ZrN+xbWWkVSt9yaYvUaY= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-23096: uacce: fix cdev handling in the cleanup path Date: Wed, 4 Feb 2026 17:14:55 +0100 Message-ID: <2026020427-CVE-2026-23096-e5af@gregkh> X-Mailer: git-send-email 2.53.0 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=2485; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=3F1ztyY5zqqGV6wwo5qGfc7IPUbmM7zkyIwFVyVvLZo=; b=owGbwMvMwCRo6H6F97bub03G02pJDJnNBclX1+2Vevhz5u2/2t3FoX/DlxfEXqk/WpbZOqOvr dcqQ+prRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAEzE6TLDgqmPC/V1NzsW1b/n 2n3fWp95W9ANH4Y5PF4Gh60O8frMPuiW/8XsMvN/gXN8AA== 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: uacce: fix cdev handling in the cleanup path When cdev_device_add fails, it internally releases the cdev memory, and if cdev_device_del is then executed, it will cause a hang error. To fix it, we check the return value of cdev_device_add() and clear uacce->cdev to avoid calling cdev_device_del in the uacce_remove. The Linux kernel CVE team has assigned CVE-2026-23096 to this issue. Affected and fixed versions =========================== Issue introduced in 5.7 with commit 015d239ac0142ad0e26567fd890ef8d171f13709 and fixed in 6.6.122 with commit d9031575a2f8aabc53af3025dd79af313a2e046b Issue introduced in 5.7 with commit 015d239ac0142ad0e26567fd890ef8d171f13709 and fixed in 6.12.68 with commit 98d67a1bd6caddd0a8b8c82a0b925742cf500936 Issue introduced in 5.7 with commit 015d239ac0142ad0e26567fd890ef8d171f13709 and fixed in 6.18.8 with commit bd2393ed7712513e7e2dbcb6e21464a67ff9e702 Issue introduced in 5.7 with commit 015d239ac0142ad0e26567fd890ef8d171f13709 and fixed in 6.19-rc7 with commit a3bece3678f6c88db1f44c602b2a63e84b4040ac 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-2026-23096 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/misc/uacce/uacce.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/d9031575a2f8aabc53af3025dd79af313a2e046b https://git.kernel.org/stable/c/98d67a1bd6caddd0a8b8c82a0b925742cf500936 https://git.kernel.org/stable/c/bd2393ed7712513e7e2dbcb6e21464a67ff9e702 https://git.kernel.org/stable/c/a3bece3678f6c88db1f44c602b2a63e84b4040ac