---
id: CVE-2023-45898
title: >-
  The Linux kernel before 6.5.4 has an es1 use-after-free in
  fs/ext4/extents_status.c, related to ext4_es_insert_extent.
summary: >-
  The Linux kernel before 6.5.4 has an es1 use-after-free in
  fs/ext4/extents_status.c, related to ext4_es_insert_extent.
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-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.5, < 6.5.4'
patched:
  - linux_kernel 6.5.4
published: '2023-10-16'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:17:10.143'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-45898'
references:
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.4'
    label: cve@mitre.org
  - url: >-
      https://github.com/torvalds/linux/commit/768d612f79822d30a1e7d132a4d4b05337ce42ec
    label: cve@mitre.org
  - url: 'https://lkml.org/lkml/2023/8/13/477'
    label: cve@mitre.org
  - url: >-
      https://lore.kernel.org/lkml/aa03f191-445c-0d2e-d6d7-0a3208d7df7a%40huawei.com/T/
    label: cve@mitre.org
  - url: 'https://www.spinics.net/lists/stable-commits/msg317086.html'
    label: cve@mitre.org
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.4'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/torvalds/linux/commit/768d612f79822d30a1e7d132a4d4b05337ce42ec
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lkml.org/lkml/2023/8/13/477'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lore.kernel.org/lkml/aa03f191-445c-0d2e-d6d7-0a3208d7df7a%40huawei.com/T/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.spinics.net/lists/stable-commits/msg317086.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00293
epssPercentile: 0.21763
ingestedAt: '2026-10-15T03:30:12.630Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2025-04-23T13:26:18.979257Z'
---

## Overview

The Linux kernel before 6.5.4 has an es1 use-after-free in fs/ext4/extents_status.c, related to ext4_es_insert_extent.

## Affected

- `linux_kernel >= 6.5, < 6.5.4`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.5.4`