{"id":"CVE-2026-72395","title":"hwmon: (pmbus) Fix passing events to regulator core","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus) Fix passing events to regulator core\n\nSashiko reports:\n\nCommit 754bd2b4a084 (\"hwmon: (pmbus/core) Protect regulator operations with\nmutex\") introduced a …","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= b26849cffaa7c43355b82e9bef3725e786973a1a < 2106bf4056858fcce3624e0c51f6fee4d41d3f2f","Linux >= acf04e2863132f6d9222f71f3a76fb9782cbe061 < 48fe43666950efefb7ac5fbdc012c1b3604096bf","Linux >= 4e9d723d9f198b86f6882a84c501ba1f39e8d055 < 489291b6b56978cc50d34e8e13f9636ea296ba8a","Linux >= 754bd2b4a084b90b5e7b630e1f423061a9b9b761 < b0ff6b6ae9c5183ef701ece7016698bde5a5bfba","Linux >= 754bd2b4a084b90b5e7b630e1f423061a9b9b761 < 9ef7dacd44216bf5ea05c8aef49eba4d145f4047","Linux f0c9ea9c3a208e79c812e10e2bcef87b46564f01","Linux 2c77ae315f3ce9d2c8e1609be74c9358c1fe4e07","Linux >= 6.6.143 < 6.6.145","Linux >= 6.12.92 < 6.12.97","Linux >= 6.18.21 < 6.18.40","Linux >= 6.1.191 < 6.2","Linux >= 6.19.11 < 6.20","Linux 7.0"],"published":"2026-08-15","updated":"2026-10-30","sourceUpdated":"2026-10-30T12:29:15.667Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72395","references":[{"url":"https://git.kernel.org/stable/c/2106bf4056858fcce3624e0c51f6fee4d41d3f2f"},{"url":"https://git.kernel.org/stable/c/48fe43666950efefb7ac5fbdc012c1b3604096bf"},{"url":"https://git.kernel.org/stable/c/489291b6b56978cc50d34e8e13f9636ea296ba8a"},{"url":"https://git.kernel.org/stable/c/b0ff6b6ae9c5183ef701ece7016698bde5a5bfba"},{"url":"https://git.kernel.org/stable/c/9ef7dacd44216bf5ea05c8aef49eba4d145f4047"}],"tags":["cve.org"],"epss":0.00182,"epssPercentile":0.07809,"ingestedAt":"2026-11-05T15:02:32.504Z","slug":"CVE-2026-72395","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus) Fix passing events to regulator core\n\nSashiko reports:\n\nCommit 754bd2b4a084 (\"hwmon: (pmbus/core) Protect regulator operations with\nmutex\") introduced a worker to batch regulator events over time using\natomic_or(). The delayed worker then passes the combined bitmask unmodified\nto regulator_notifier_call_chain().\n\nThe core regulator subsystem's regulator_handle_critical() function\nevaluates the event parameter using a strict switch statement. If\nmultiple distinct faults occur before the worker runs (e.g.,\nREGULATOR_EVENT_UNDER_VOLTAGE | REGULATOR_EVENT_OVER_CURRENT), the combined\nbitmask fails to match any case. This leaves the reason as NULL and\ncompletely bypasses the critical hw_protection_trigger().\n\nFix the problem by passing events bit by bit to the regulator event\nhandler.\n\n## Affected\n\n- `Linux >= b26849cffaa7c43355b82e9bef3725e786973a1a < 2106bf4056858fcce3624e0c51f6fee4d41d3f2f`\n- `Linux >= acf04e2863132f6d9222f71f3a76fb9782cbe061 < 48fe43666950efefb7ac5fbdc012c1b3604096bf`\n- `Linux >= 4e9d723d9f198b86f6882a84c501ba1f39e8d055 < 489291b6b56978cc50d34e8e13f9636ea296ba8a`\n- `Linux >= 754bd2b4a084b90b5e7b630e1f423061a9b9b761 < b0ff6b6ae9c5183ef701ece7016698bde5a5bfba`\n- `Linux >= 754bd2b4a084b90b5e7b630e1f423061a9b9b761 < 9ef7dacd44216bf5ea05c8aef49eba4d145f4047`\n- `Linux f0c9ea9c3a208e79c812e10e2bcef87b46564f01`\n- `Linux 2c77ae315f3ce9d2c8e1609be74c9358c1fe4e07`\n- `Linux >= 6.6.143 < 6.6.145`\n- `Linux >= 6.12.92 < 6.12.97`\n- `Linux >= 6.18.21 < 6.18.40`\n- `Linux >= 6.1.191 < 6.2`\n- `Linux >= 6.19.11 < 6.20`\n- `Linux 7.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}