---
id: CVE-2026-97961
title: |-
  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::sch…
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::sch…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= bd27568117664b8b3e259721393df420ed51f57b <
    723e85fb2c3bcd237ac02cbd69502ed62ce0068c
  - >-
    Linux >= bd27568117664b8b3e259721393df420ed51f57b <
    6d0b9ce3be221c9077653f3670d60d66bb725ee2
  - >-
    Linux >= bd27568117664b8b3e259721393df420ed51f57b <
    e2770c76a02452fddb52e9e05c7ed6acfef06c32
  - >-
    Linux >= bd27568117664b8b3e259721393df420ed51f57b <
    59e63416f5153e7d58652c616fbdcb7d5e01fff7
  - Linux 6.2
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:23.860'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97961'
references:
  - url: 'https://git.kernel.org/stable/c/59e63416f5153e7d58652c616fbdcb7d5e01fff7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6d0b9ce3be221c9077653f3670d60d66bb725ee2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/723e85fb2c3bcd237ac02cbd69502ed62ce0068c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e2770c76a02452fddb52e9e05c7ed6acfef06c32'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97961.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97961'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541098'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-97961'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97961'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97961.mbox
  - url: 'https://git.kernel.org/stable/c/fa360a018369f3eb4fe4f4792238adfc1f6fd5dc'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-25T11:06:38.875Z'
epss: 0.00168
epssPercentile: 0.06162
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-825
---

## Overview

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().

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97961.json)