---
id: CVE-2026-45838
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: fix end-of-list detection in cgroup_storage_get_next_key()

  list_next_entry() never returns NULL -- when the current element is the
  last entry it wraps to the list…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: fix end-of-list detection in cgroup_storage_get_next_key()

  list_next_entry() never returns NULL -- when the current element is the
  last entry it wraps to the list…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.19, < 5.10.258'
  - 'linux_kernel >= 5.11, < 5.15.209'
  - 'linux_kernel >= 5.16, < 6.1.175'
  - 'linux_kernel >= 6.2, < 6.6.141'
  - 'linux_kernel >= 6.7, < 6.12.91'
  - 'linux_kernel >= 6.13, < 6.18.33'
  - 'linux_kernel >= 6.19, < 7.0.10'
patched:
  - linux_kernel 7.0.10
published: '2026-05-27'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:36.393'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45838'
references:
  - url: 'https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49af'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81f'
    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
  - cve.org
epss: 0.00162
epssPercentile: 0.05067
ingestedAt: '2026-10-15T03:30:12.877Z'
---

## Overview

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

bpf: fix end-of-list detection in cgroup_storage_get_next_key()

list_next_entry() never returns NULL -- when the current element is the
last entry it wraps to the list head via container_of(). The subsequent
NULL check is therefore dead code and get_next_key() never returns
-ENOENT for the last element, instead reading storage->key from a bogus
pointer that aliases internal map fields and copying the result to
userspace.

Replace it with list_entry_is_head() so the function correctly returns
-ENOENT when there are no more entries.

## Affected

- `linux_kernel >= 4.19, < 5.10.258`
- `linux_kernel >= 5.11, < 5.15.209`
- `linux_kernel >= 5.16, < 6.1.175`
- `linux_kernel >= 6.2, < 6.6.141`
- `linux_kernel >= 6.7, < 6.12.91`
- `linux_kernel >= 6.13, < 6.18.33`
- `linux_kernel >= 6.19, < 7.0.10`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.10`