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 C8769376BF1 for ; Sat, 15 Aug 2026 06:26:09 +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=1786775170; cv=none; b=iiUN9PSoOKEKjjOR5Tp/y4NM34LW8YToMHBPkALAQYS2xS0nkuyuo6hP8/lcVEmrbCcagAPJxn5bD598xVpRl0UFcsVkDkWwRnTJ7B6YC8gmjU+M0HZdV4ZtCPda5uHLEJGhe1SkXUIa4ZfPaHjDT0d/+qQcgx/0UpvbKkQ7hEk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786775170; c=relaxed/simple; bh=yLfm2E6rglbgObCWwKuzE0qeeqm8kXmGR2dgxxV8RB0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mYMOJdlYV/MhhCSD7eGIcxaCa+8QtVCNmrZgTGmuxju4N8tn857O1ALo0hM03eYCkFF9bmfydvbMqhzsjKaOlkTbY1FTfZ8eRwz4NacDPt19nZHZBOBVTpHMBsIa2HI0ByujWWmCUvCFFoamR4itCphxIymgMO5siCBwaRNjHIo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jPGV38CQ; 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="jPGV38CQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCA4C1F000E9; Sat, 15 Aug 2026 06:26:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786775169; bh=UhiMZWlYGLmnlGEQD6VDD8l9CmW9RkcEq5khPCAXLxM=; h=From:To:Cc:Subject:Date:Reply-To; b=jPGV38CQja6mXImbGwHIy3S4ZWhseo2lr6tAL03BcntMp9pR3BM4JBNnl3RHeLY0W LyWjXkc3CYkvg58XKgPdbqfTAoPn+afQxmwxZqgJfED5qIhXCz38oJ2aI1BxBtttks IpLx24m1+/z4EqEXv+lTAoSnXSKiHirGxMsZ88GA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-72395: hwmon: (pmbus) Fix passing events to regulator core Date: Sat, 15 Aug 2026 15:07:54 +0900 Message-ID: <2026081520-CVE-2026-72395-910e@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=3312; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=/pmNQR0vtGksou96tIx9+phhUPQByYGrKintxjIxFS4=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDG/c79lsUn57+eDmc24z1lVNjDBsWMHharj5aI3sv cae/PnWHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCRNx0M8zPE5fb3s69z+X6I cdJ1phthi+6s/cGw4Pg6NjPTIPZ454a/X3KkRHgumhQUAgA= 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: (pmbus) Fix passing events to regulator core Sashiko reports: Commit 754bd2b4a084 ("hwmon: (pmbus/core) Protect regulator operations with mutex") introduced a worker to batch regulator events over time using atomic_or(). The delayed worker then passes the combined bitmask unmodified to regulator_notifier_call_chain(). The core regulator subsystem's regulator_handle_critical() function evaluates the event parameter using a strict switch statement. If multiple distinct faults occur before the worker runs (e.g., REGULATOR_EVENT_UNDER_VOLTAGE | REGULATOR_EVENT_OVER_CURRENT), the combined bitmask fails to match any case. This leaves the reason as NULL and completely bypasses the critical hw_protection_trigger(). Fix the problem by passing events bit by bit to the regulator event handler. The Linux kernel CVE team has assigned CVE-2026-72395 to this issue. Affected and fixed versions =========================== Issue introduced in 6.6.143 with commit b26849cffaa7c43355b82e9bef3725e786973a1a and fixed in 6.6.145 with commit 2106bf4056858fcce3624e0c51f6fee4d41d3f2f Issue introduced in 6.12.92 with commit acf04e2863132f6d9222f71f3a76fb9782cbe061 and fixed in 6.12.97 with commit 48fe43666950efefb7ac5fbdc012c1b3604096bf Issue introduced in 6.18.21 with commit 4e9d723d9f198b86f6882a84c501ba1f39e8d055 and fixed in 6.18.40 with commit 489291b6b56978cc50d34e8e13f9636ea296ba8a Issue introduced in 7.0 with commit 754bd2b4a084b90b5e7b630e1f423061a9b9b761 and fixed in 7.1.5 with commit b0ff6b6ae9c5183ef701ece7016698bde5a5bfba Issue introduced in 7.0 with commit 754bd2b4a084b90b5e7b630e1f423061a9b9b761 and fixed in 7.2-rc2 with commit 9ef7dacd44216bf5ea05c8aef49eba4d145f4047 Issue introduced in 6.19.11 with commit 2c77ae315f3ce9d2c8e1609be74c9358c1fe4e07 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-2026-72395 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/pmbus/pmbus_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/2106bf4056858fcce3624e0c51f6fee4d41d3f2f https://git.kernel.org/stable/c/48fe43666950efefb7ac5fbdc012c1b3604096bf https://git.kernel.org/stable/c/489291b6b56978cc50d34e8e13f9636ea296ba8a https://git.kernel.org/stable/c/b0ff6b6ae9c5183ef701ece7016698bde5a5bfba https://git.kernel.org/stable/c/9ef7dacd44216bf5ea05c8aef49eba4d145f4047