---
id: CVE-2026-43074
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  eventpoll: defer struct eventpoll free to RCU grace period

  In certain situations, ep_free() in eventpoll.c will kfree the epi->ep
  eventpoll struct while it still being…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  eventpoll: defer struct eventpoll free to RCU grace period

  In certain situations, ep_free() in eventpoll.c will kfree the epi->ep
  eventpoll struct while it still being…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-401
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.4.1, < 6.6.136'
  - 'linux_kernel >= 6.7, < 6.12.83'
  - 'linux_kernel >= 6.13, < 6.18.24'
  - 'linux_kernel >= 6.19, < 6.19.14'
  - linux_kernel = 6.4
  - linux_kernel = 7.0
patched:
  - linux_kernel 6.19.14
published: '2026-05-06'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:29.813'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43074'
references:
  - url: 'https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/902120be4f44947df6311002addc7faf69bdbff1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a6d57084372161f86660bc4607784420e00efe2c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - exploit-available
  - cve.org
epss: 0.00176
epssPercentile: 0.06629
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/PeronGH/badepoll-selinux-disabler'
  checkedAt: '2026-10-15T03:30:48.754Z'
exploitAvailable: true
ingestedAt: '2026-10-15T03:30:12.871Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

eventpoll: defer struct eventpoll free to RCU grace period

In certain situations, ep_free() in eventpoll.c will kfree the epi->ep
eventpoll struct while it still being used by another concurrent thread.
Defer the kfree() to an RCU callback to prevent UAF.

## Affected

- `linux_kernel >= 6.4.1, < 6.6.136`
- `linux_kernel >= 6.7, < 6.12.83`
- `linux_kernel >= 6.13, < 6.18.24`
- `linux_kernel >= 6.19, < 6.19.14`
- `linux_kernel = 6.4`
- `linux_kernel = 7.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.14`