CVE-2026-74405 (GCVE-0-2026-74405)
Vulnerability from cvelistv5
Published
2026-08-15 05:59
Modified
2026-10-21 12:45
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: OPP: Fix race between OPP addition and lookup A race exists between dev_pm_opp_add_dynamic() and dev_pm_opp_find_freq_exact(): CPU0 (add) CPU1 (lookup) ------------------------------- ------------------------------ _opp_add() mutex_lock() list_add(&new_opp->node, head) mutex_unlock() _opp_table_find_key() mutex_lock() dev_pm_opp_get(opp) kref_get() mutex_unlock() kref_init(&new_opp->kref) dev_pm_opp_put() kref_put_mutex() The newly added OPP is inserted into the list before its kref is initialized. A concurrent lookup can find this OPP and increment its reference count while it is still uninitialized, leading to refcount corruption and a potential premature free. Fix this by initializing ->kref and ->opp_table before making the OPP visible via list_add(). This ensures any concurrent lookup observes a fully initialized object. [ Viresh: Updated commit log ]
References
Impacted products
Vendor Product Version
Linux Linux Version: 7034764a1e4a6edbb60914e89aad8384e3fe5d17
Version: 7034764a1e4a6edbb60914e89aad8384e3fe5d17
Version: 7034764a1e4a6edbb60914e89aad8384e3fe5d17
Version: 7034764a1e4a6edbb60914e89aad8384e3fe5d17
Version: 7034764a1e4a6edbb60914e89aad8384e3fe5d17
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