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 950C830675D for ; Mon, 8 Jun 2026 15:47:43 +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=1780933664; cv=none; b=MheZ6kKgPntaQBb02T/PgtuNjwFyr+wbJ4vjC32sBdo52bWMiNc8mPr7KmwPfXEa821tAcvwJPSVhyRxAGf4NO9E8OR9hVcwQGRpTNtA/3Wxp7SaJm5qEhgia5NV5W2Qt4m2C3Mn53ASGCDcgo+IcAxfuwLNA+Vw45/7A0MB060= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780933664; c=relaxed/simple; bh=mobEFKMSa27En3t111ak8bP0yg7I1vf2+FLTE+IhHzo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=nRYZNOHsJidLl9cfO6KFC2vxjw3z1xvJocatYHSiM6OtD8auao7Xd+JfrlT+WqmPuNOSvlHIRyYNr2HgvpEeq6jEgmTQrnEoscaJsNIoIyRRXGiwC+3zAlqy56vnIYsbNVoGUvc22kXnktmRS/QYGzIItIYOQqihYAqPK0VqfFg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XNF3wm0T; 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="XNF3wm0T" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1B801F00893; Mon, 8 Jun 2026 15:47:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780933663; bh=xrYNCmH/Tsoxih0Ha3Jpm0wLQvPE89OMVrpqLInlcHk=; h=From:To:Cc:Subject:Date:Reply-To; b=XNF3wm0TI4PPZqWx3sLDT7q5TOqHh8mYs0/Cw55Hu+VaGjN4rJ2r0/aedIyqmNX8R 3NCayiEEn3lIAb32rLqmW9EgJHhXBO/hbEtrAe+USsvt9lPBbxOpQE+ty6uGX095YZ L7xHLW9vU5jaEy9XJ3WxU1JW5Gtexot1uBxWeQXo= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-46292: pmdomain: core: Fix detach procedure for virtual devices in genpd Date: Mon, 8 Jun 2026 17:46:00 +0200 Message-ID: <2026060857-CVE-2026-46292-92c0@gregkh> X-Mailer: git-send-email 2.54.0 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=3269; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=W21Pb1PvSai9nVTj4zWdl8wqsj/3Wjy5ZAo7ZJqTt6Y=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlqj7fqTj9X4DzPd/63Jy1bjLYu3+G+Z59ct8J0KeeUz 9wvDx2d1RHLwiDIxCArpsjyZRvP0f0VhxS9DG1Pw8xhZQIZwsDFKQATsaxmmF+9XG1/98ako8sm lW62rlMQLFv5MZVhwYKamYzzeh4HlU66YtTywPtASsGBuQA= 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: pmdomain: core: Fix detach procedure for virtual devices in genpd If a device is attached to a PM domain through genpd_dev_pm_attach_by_id(), genpd calls pm_runtime_enable() for the corresponding virtual device that it registers. While this avoids boilerplate code in drivers, there is no corresponding call to pm_runtime_disable() in genpd_dev_pm_detach(). This means these virtual devices are typically detached from its genpd, while runtime PM remains enabled for them, which is not how things are designed to work. In worst cases it may lead to critical errors, like a NULL pointer dereference bug in genpd_runtime_suspend(), which was recently reported. For another case, we may end up keeping an unnecessary vote for a performance state for the device. To fix these problems, let's add this missing call to pm_runtime_disable() in genpd_dev_pm_detach(). The Linux kernel CVE team has assigned CVE-2026-46292 to this issue. Affected and fixed versions =========================== Issue introduced in 4.18 with commit 3c095f32a92be4d07f3172a777dab1aacdb6a728 and fixed in 6.6.141 with commit 707cb5df3eab32ddc52979418f7ace62941e6381 Issue introduced in 4.18 with commit 3c095f32a92be4d07f3172a777dab1aacdb6a728 and fixed in 6.12.88 with commit 361518a26e4434e879db6ff43bf364795dcbfbff Issue introduced in 4.18 with commit 3c095f32a92be4d07f3172a777dab1aacdb6a728 and fixed in 6.18.30 with commit 51a7dd9cbae9210335ce398642ecaaa52c939eb5 Issue introduced in 4.18 with commit 3c095f32a92be4d07f3172a777dab1aacdb6a728 and fixed in 7.0.7 with commit 8d44391a7f29e4601e8243f13498d0219bab2576 Issue introduced in 4.18 with commit 3c095f32a92be4d07f3172a777dab1aacdb6a728 and fixed in 7.1-rc3 with commit 26735dfdd8930d9ef1fa92e590a9bf77726efdf6 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-2026-46292 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/pmdomain/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/707cb5df3eab32ddc52979418f7ace62941e6381 https://git.kernel.org/stable/c/361518a26e4434e879db6ff43bf364795dcbfbff https://git.kernel.org/stable/c/51a7dd9cbae9210335ce398642ecaaa52c939eb5 https://git.kernel.org/stable/c/8d44391a7f29e4601e8243f13498d0219bab2576 https://git.kernel.org/stable/c/26735dfdd8930d9ef1fa92e590a9bf77726efdf6