{"api_version":"1","generated_at":"2026-08-15T08:44:31+00:00","cve":"CVE-2026-74405","urls":{"html":"https://cve.report/CVE-2026-74405","api":"https://cve.report/api/cve/CVE-2026-74405.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74405","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74405"},"summary":{"title":"OPP: Fix race between OPP addition and lookup","description":"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)                          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 ]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:42","updated_at":"2026-08-15 06:22:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f5e1cc9a284bff2510981643a5bca4bc4c21b81a","name":"https://git.kernel.org/stable/c/f5e1cc9a284bff2510981643a5bca4bc4c21b81a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5","name":"https://git.kernel.org/stable/c/bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/46696b0b2123475d7f95909435c09808fc5ffd23","name":"https://git.kernel.org/stable/c/46696b0b2123475d7f95909435c09808fc5ffd23","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74405","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74405","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7034764a1e4a6edbb60914e89aad8384e3fe5d17 46696b0b2123475d7f95909435c09808fc5ffd23 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7034764a1e4a6edbb60914e89aad8384e3fe5d17 bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7034764a1e4a6edbb60914e89aad8384e3fe5d17 f5e1cc9a284bff2510981643a5bca4bc4c21b81a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/opp/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"46696b0b2123475d7f95909435c09808fc5ffd23","status":"affected","version":"7034764a1e4a6edbb60914e89aad8384e3fe5d17","versionType":"git"},{"lessThan":"bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5","status":"affected","version":"7034764a1e4a6edbb60914e89aad8384e3fe5d17","versionType":"git"},{"lessThan":"f5e1cc9a284bff2510981643a5bca4bc4c21b81a","status":"affected","version":"7034764a1e4a6edbb60914e89aad8384e3fe5d17","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/opp/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.11"},{"lessThan":"4.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"4.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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)                          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 ]"}],"providerMetadata":{"dateUpdated":"2026-08-15T05:59:14.719Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"OPP: Fix race between OPP addition and lookup","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74405","datePublished":"2026-08-15T05:59:14.719Z","dateReserved":"2026-08-15T05:44:03.892Z","dateUpdated":"2026-08-15T05:59:14.719Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:42","lastModifiedDate":"2026-08-15 06:22:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74405","Ordinal":"1","Title":"OPP: Fix race between OPP addition and lookup","CVE":"CVE-2026-74405","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74405","Ordinal":"1","NoteData":"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)                          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 ]","Type":"Description","Title":"OPP: Fix race between OPP addition and lookup"}]}}}