CVE-2026-97961 (GCVE-0-2026-97961)
Vulnerability from cvelistv5
Published
2026-09-25 10:23
Modified
2026-10-21 12:53
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: perf/core: Allow list_del during perf_event_overflow() A PMU might use perf_sched_cb_inc() and perf_sched_cb_dec() interface to get the PMU call back function pmu::sched_task invoked at schedule in and schedule out. This is achieved by walking along the list anchored by sched_cb_list. The following scenario might lead to a list corruption. perf_pmu_sched_task() for_each_list_entry(..., &sched_cb_list) +--> __perf_pmu_sched_task() +--> event->pmu->sched_task()) +--> PMU_push_sample() +--> perf_event_overflow() +--> __perf_event_overflow() +--> pmu->stop() +--> perf_sched_cb_dec() remove entry from sched_cb_list while list node in use. This happens when ioctl(fd, PERF_EVENT_IOC_REFRESH, xxx) has been invoked and perf_event::event_limit hits zero. Prevent the list corruption and convert for_each_list_entry() to for_each_list_entry_safe().
References
Impacted products
Vendor Product Version
Linux Linux Version: bd27568117664b8b3e259721393df420ed51f57b
Version: bd27568117664b8b3e259721393df420ed51f57b
Version: bd27568117664b8b3e259721393df420ed51f57b
Version: bd27568117664b8b3e259721393df420ed51f57b
Version: bd27568117664b8b3e259721393df420ed51f57b
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{
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          "programFiles": [
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "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(..., \u0026sched_cb_list)\n      +--\u003e __perf_pmu_sched_task()\n           +--\u003e event-\u003epmu-\u003esched_task())\n                +--\u003e PMU_push_sample()\n                     +--\u003e perf_event_overflow()\n                          +--\u003e __perf_event_overflow()\n                               +--\u003e pmu-\u003estop()\n                                    +--\u003e 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()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:53:52.027Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fa360a018369f3eb4fe4f4792238adfc1f6fd5dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/723e85fb2c3bcd237ac02cbd69502ed62ce0068c"
        },
        {
          "url": "https://git.kernel.org/stable/c/6d0b9ce3be221c9077653f3670d60d66bb725ee2"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2770c76a02452fddb52e9e05c7ed6acfef06c32"
        },
        {
          "url": "https://git.kernel.org/stable/c/59e63416f5153e7d58652c616fbdcb7d5e01fff7"
        }
      ],
      "title": "perf/core: Allow list_del during perf_event_overflow()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97961",
    "datePublished": "2026-09-25T10:23:05.547Z",
    "dateReserved": "2026-09-25T10:18:58.206Z",
    "dateUpdated": "2026-10-21T12:53:52.027Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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