{"id":"CVE-2026-74405","title":"OPP: Fix race between OPP addition and lookup","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nOPP: Fix race between OPP addition and lookup\n\nA race exists between dev_pm_opp_add_dynamic() and\ndev_pm_opp_find_freq_exact():\n\n  CPU0 (add)                          C…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 7034764a1e4a6edbb60914e89aad8384e3fe5d17 < 46696b0b2123475d7f95909435c09808fc5ffd23","Linux >= 7034764a1e4a6edbb60914e89aad8384e3fe5d17 < bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5","Linux >= 7034764a1e4a6edbb60914e89aad8384e3fe5d17 < f5e1cc9a284bff2510981643a5bca4bc4c21b81a","Linux 4.11"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:55:48.602720Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:43.186Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74405","references":[{"url":"https://git.kernel.org/stable/c/46696b0b2123475d7f95909435c09808fc5ffd23"},{"url":"https://git.kernel.org/stable/c/bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5"},{"url":"https://git.kernel.org/stable/c/f5e1cc9a284bff2510981643a5bca4bc4c21b81a"}],"tags":["cve.org"],"epss":0.00128,"epssPercentile":0.02153,"ingestedAt":"2026-10-16T19:46:24.367Z","slug":"CVE-2026-74405","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nOPP: Fix race between OPP addition and lookup\n\nA race exists between dev_pm_opp_add_dynamic() and\ndev_pm_opp_find_freq_exact():\n\n  CPU0 (add)                          CPU1 (lookup)\n  -------------------------------     ------------------------------\n  _opp_add()\n    mutex_lock()\n    list_add(&new_opp->node, head)\n    mutex_unlock()                    _opp_table_find_key()\n                                        mutex_lock()\n                                        dev_pm_opp_get(opp)\n                                          kref_get()\n                                        mutex_unlock()\n    kref_init(&new_opp->kref)\n                                      dev_pm_opp_put()\n                                        kref_put_mutex()\n\nThe newly added OPP is inserted into the list before its kref is\ninitialized. A concurrent lookup can find this OPP and increment its\nreference count while it is still uninitialized, leading to refcount\ncorruption and a potential premature free.\n\nFix this by initializing ->kref and ->opp_table before making the OPP\nvisible via list_add(). This ensures any concurrent lookup observes a\nfully initialized object.\n\n[ Viresh: Updated commit log ]\n\n## Affected\n\n- `Linux >= 7034764a1e4a6edbb60914e89aad8384e3fe5d17 < 46696b0b2123475d7f95909435c09808fc5ffd23`\n- `Linux >= 7034764a1e4a6edbb60914e89aad8384e3fe5d17 < bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5`\n- `Linux >= 7034764a1e4a6edbb60914e89aad8384e3fe5d17 < f5e1cc9a284bff2510981643a5bca4bc4c21b81a`\n- `Linux 4.11`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}