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 0FE1D4C33C5 for ; Sun, 18 Oct 2026 16:18:59 +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=1792340340; cv=none; b=YdrujuwHDkM2BaDfQ6n9v/RwON6gKvNwYvcA5U5Kgr8lD+/JF4JHsShBbBTM1YSCxm3PkWP60+iQ3ShwCJ/Us7HNu5CGHSbnbDftsBwr9xJnts8TTmP0bgXh0vJ6QXgyNOj1jsn7ob8GE60sgJOdRMHXI6MbZRy/xc1zVF/pEnA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792340340; c=relaxed/simple; bh=HCJ9OYcoko/C+v+8q1xbm+LDdz1FyBbXBUd7oLn80GM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Zzs5SMHyCXKG+Kcq2dTWppLp5Mk83r4wCNqpy/21ew6fU8+hd4rgmzIe5K2FL7is0o3OYQv9yygV9EwG0GpbxdZ3sWzd78HXPL8D6ZTADNEWYHMrQuVAH00UbKrENrTMIaNcazn9ccCvem7bg+ITgH0hH+Jkiqd8kYEoLS5Nc6I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=1adISzgy; 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="1adISzgy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09B9E1F000C4; Sun, 18 Oct 2026 16:18:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792340339; bh=ST8prP1Spxr+MH8T5XsbS8n/HOZJqvyYHvsO+ndCHCM=; h=From:To:Cc:Subject:Date:Reply-To; b=1adISzgy5J6RDijBZQU5VAU8V6ufUCXy2iKg9TjuFUxLwKtlQmYOwDYZzXyQu0vZ6 3QmBfc6ME0rjaPg05TELasmQGdZlfDcZg4T2dpk4Vi6YolKQopONilZTZQ+Rs4agxo 7wt4x4OJlFmKJ78zwz/UZ7RGue6C/KIgA8VXBgQ0= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-98757: usb: cdns3: fix use-after-free in cdns3_gadget_exit() Date: Sun, 18 Oct 2026 17:45:32 +0200 Message-ID: <2026101816-CVE-2026-98757-b87d@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=3005; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=Mg6eUPHGRkxSFLPsurDa/T7tc31cR6CQE6myiRYkoo0=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlXXgbITRdrKKzJNbez5zlutTty1ZRrJbtM5a+WcPD4L Wut26LWEcvCIMjEICumyPJlG8/R/RWHFL0MbU/DzGFlAhnCwMUpABOZp8Ewv4Dd7TRfk/PO6Bea 90NzdMv3me54zbDg4q1/UXO6rVjzpT251gVynFF42NYFAA== 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: usb: cdns3: fix use-after-free in cdns3_gadget_exit() cdns3_gadget_start() arms two works on system_freezable_wq: pending_status_wq for the deferred ep0 status stage and aligned_buf_wq for realigned request buffers. Both handlers use the cdns3_device the works are embedded in, and cdns3_pending_setup_status_handler() also calls the ep0 request completion. cdns3_gadget_exit() does not wait for these works. It frees all endpoints and aligned buffers and drops the last reference to the gadget device, which frees priv_dev, so a work queued before the exit can run after the free. Fix this by waiting for both works after the gadget driver is unbound and the IRQ is freed, when no new work can be queued, and before the endpoints and buffers are released. This issue was found by an in-house static analysis tool. The Linux kernel CVE team has assigned CVE-2026-98757 to this issue. Affected and fixed versions =========================== Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 6.12.113 with commit cc448700db656cceb4b411bf99a2e7132144d035 Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 6.18.56 with commit 95160fe606e685ff18de1e6ddcbc08289476004e Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 7.2.10 with commit 159dada48ee2d53eff46e66a8011d67b2c209bbc Issue introduced in 5.4 with commit 7733f6c32e36ff9d7adadf40001039bf219b1cbe and fixed in 7.3-rc6 with commit ebe9b68c396792c15d0ac690d592e449e74ed804 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-2026-98757 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/usb/cdns3/cdns3-gadget.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/cc448700db656cceb4b411bf99a2e7132144d035 https://git.kernel.org/stable/c/95160fe606e685ff18de1e6ddcbc08289476004e https://git.kernel.org/stable/c/159dada48ee2d53eff46e66a8011d67b2c209bbc https://git.kernel.org/stable/c/ebe9b68c396792c15d0ac690d592e449e74ed804