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 747104908AF for ; Fri, 25 Sep 2026 10:25:25 +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=1790331929; cv=none; b=TyOItA7s5zO1vtypC8ENPOgRZ2lhpUQ+pJUmSO58urxAEbdWtVfS4eGsJGXEviJjCdIvvhZq4vB6XzhnjH4T+X5kJLoiQEOgoQdZleFBpTWDBcVL/o8NRrhSfsN6mY7aVYWEvtB045sWT+bmosHOqiRKo2LAQPCr4s6AL1+JnOo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790331929; c=relaxed/simple; bh=UCn8zzfp94DZZBSxg3byZonSD74006kBoAGVUVTPqJ8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=l9V2rl2xjhFYXlN2T4CAJYMJp/4XuMuAYH71KzE8NDYzOWj8JRiOmOqX/I5JKaidx2LLM7cIaKvOFxguiYjbrKJbyGZwbL0CdJFLiBsu0UZhn/Um7QwI3mcjCzMqINn0mBQ3XF4wmfOiwXNZ/u6YHVsvcHJlc8uHnZs+SiVY1oE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=BITE8McM; 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="BITE8McM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 631971F000FF; Fri, 25 Sep 2026 10:25:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790331923; bh=bQfYWlRGbP0u7nT30BmVVSLW38ZNujNoMqSUYSgcE4s=; h=From:To:Cc:Subject:Date:Reply-To; b=BITE8McM8hLML31xLGj8/RQo12fcmflLh7DjDHNaNIOOt5wom466/u2PA3tHSCERx Og9UqCRQqljF7l0XWjv9jIhC1n4uRwiKEHQLh2zCv1VFLD4+Yy4HjXzQDqQ5Q62Jii 9acB0BjtCQ4sAV14wJqJFFUZZrA+qOzU+ZL2zqyU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-97582: hwmon: (gpio-fan) Fix use-after-free in alarm work Date: Fri, 25 Sep 2026 12:22:42 +0200 Message-ID: <2026092556-CVE-2026-97582-9987@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=2870; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=QgImL18jMzxdVRVod0ygxQ9P0dDWbmL1D23370rz69E=; b=owGbwMvMwCRo6H6F97bub03G02pJDFnbvF1m/7Tde3gXd7zt6iYWUWun+cXm2zfWbDYr1zl49 MoB3o/fO2JZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAi2e4MC84+v6wqJMecxe62 6Gy90XXPaSzloQzzE1VT83YeyJFO2/tNXLZ74aOwa5OPAgA= 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: hwmon: (gpio-fan) Fix use-after-free in alarm work fan_alarm_irq_handler() queues fan_data->alarm_work, but nothing cancels it. fan_alarm_notify() dereferences fan_data and its hwmon device. On unbind, devres frees the interrupt, which only waits for the handler itself, and then releases the hwmon device and fan_data, so a pending fan_alarm_notify() can run after those frees. Replace INIT_WORK() with devm_work_autocancel(), registered before devm_request_irq(). The devres cleanup then frees the interrupt first, so no new work can be queued, and cancels the work while fan_data and the hwmon device are still alive. This issue was found by an in-house static analysis tool. The Linux kernel CVE team has assigned CVE-2026-97582 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.37 with commit d6fe1360f42e86262153927986dea6502daff703 and fixed in 6.12.111 with commit 9b12bd724db9db318e3a68be17693583dc29a066 Issue introduced in 2.6.37 with commit d6fe1360f42e86262153927986dea6502daff703 and fixed in 6.18.53 with commit 30755d3a5782cd704c8921cac8ee66dffe4383ea Issue introduced in 2.6.37 with commit d6fe1360f42e86262153927986dea6502daff703 and fixed in 7.2.7 with commit c6ab7f855891877a16d2e2ddf0cd0305fd098a85 Issue introduced in 2.6.37 with commit d6fe1360f42e86262153927986dea6502daff703 and fixed in 7.3-rc3 with commit a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293 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-2026-97582 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/hwmon/gpio-fan.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/9b12bd724db9db318e3a68be17693583dc29a066 https://git.kernel.org/stable/c/30755d3a5782cd704c8921cac8ee66dffe4383ea https://git.kernel.org/stable/c/c6ab7f855891877a16d2e2ddf0cd0305fd098a85 https://git.kernel.org/stable/c/a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293