FKIE_CVE-2026-97961

Vulnerability from fkie_nvd - Published: 2026-09-25 11:17 - Updated: 2026-09-25 11:17
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/59e63416f5153e7d58652c616fbdcb7d5e01fff7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d0b9ce3be221c9077653f3670d60d66bb725ee2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/723e85fb2c3bcd237ac02cbd69502ed62ce0068c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2770c76a02452fddb52e9e05c7ed6acfef06c32
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/events/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "723e85fb2c3bcd237ac02cbd69502ed62ce0068c",
              "status": "affected",
              "version": "bd27568117664b8b3e259721393df420ed51f57b",
              "versionType": "git"
            },
            {
              "lessThan": "6d0b9ce3be221c9077653f3670d60d66bb725ee2",
              "status": "affected",
              "version": "bd27568117664b8b3e259721393df420ed51f57b",
              "versionType": "git"
            },
            {
              "lessThan": "e2770c76a02452fddb52e9e05c7ed6acfef06c32",
              "status": "affected",
              "version": "bd27568117664b8b3e259721393df420ed51f57b",
              "versionType": "git"
            },
            {
              "lessThan": "59e63416f5153e7d58652c616fbdcb7d5e01fff7",
              "status": "affected",
              "version": "bd27568117664b8b3e259721393df420ed51f57b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/events/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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()."
    }
  ],
  "id": "CVE-2026-97961",
  "lastModified": "2026-09-25T11:17:23.860",
  "metrics": {},
  "published": "2026-09-25T11:17:23.860",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/59e63416f5153e7d58652c616fbdcb7d5e01fff7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6d0b9ce3be221c9077653f3670d60d66bb725ee2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/723e85fb2c3bcd237ac02cbd69502ed62ce0068c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e2770c76a02452fddb52e9e05c7ed6acfef06c32"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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