{"cve":"CVE-2026-97961","nvd":{"published":"2026-09-25T11:17:23.860","modified":"2026-10-21T13:21:17.717","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Allow list_del during perf_event_overflow()\n\nA PMU might use perf_sched_cb_inc() and perf_sched_cb_dec()\ninterface to get the PMU call back function pmu::sched_task\ninvoked at schedule in and schedule out. This is achieved\nby walking along the list anchored by sched_cb_list.\n\nThe following scenario might lead to a list corruption.\n\n   perf_pmu_sched_task()\n      for_each_list_entry(..., &sched_cb_list)\n      +--> __perf_pmu_sched_task()\n           +--> event->pmu->sched_task())\n                +--> PMU_push_sample()\n                     +--> perf_event_overflow()\n                          +--> __perf_event_overflow()\n                               +--> pmu->stop()\n                                    +--> perf_sched_cb_dec()\n                                         remove entry from sched_cb_list\n                                         while list node in use.\n\nThis happens when ioctl(fd, PERF_EVENT_IOC_REFRESH, xxx) has been\ninvoked and perf_event::event_limit hits zero.\n\nPrevent the list corruption and convert for_each_list_entry()\nto for_each_list_entry_safe().","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/59e63416f5153e7d58652c616fbdcb7d5e01fff7","https://git.kernel.org/stable/c/6d0b9ce3be221c9077653f3670d60d66bb725ee2","https://git.kernel.org/stable/c/723e85fb2c3bcd237ac02cbd69502ed62ce0068c","https://git.kernel.org/stable/c/e2770c76a02452fddb52e9e05c7ed6acfef06c32","https://git.kernel.org/stable/c/fa360a018369f3eb4fe4f4792238adfc1f6fd5dc"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-97961","score":0.00168,"percentile":0.06157,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}