---
id: CVE-2023-4611
title: >-
  A use-after-free flaw was found in mm/mempolicy.c in the memory management
  subsystem in the Linux Kernel
summary: >-
  A use-after-free flaw was found in mm/mempolicy.c in the memory management
  subsystem in the Linux Kernel. This issue is caused by a race between mbind()
  and VMA-locked page fault, and may allow a local attacker to crash the system
  or lea…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.4, < 6.4.8'
  - linux_kernel = 6.5
patched:
  - linux_kernel 6.4.8
published: '2023-08-29'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T16:15:24.103'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-4611'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2023-4611'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2227244'
    label: secalert@redhat.com
  - url: 'https://www.spinics.net/lists/stable-commits/msg310136.html'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2023-4611'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2227244'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.spinics.net/lists/stable-commits/msg310136.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-4611.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2023-4611'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2023-4611'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00269
epssPercentile: 0.19339
ingestedAt: '2026-09-11T16:45:47.841Z'
---

## Overview

A use-after-free flaw was found in mm/mempolicy.c in the memory management subsystem in the Linux Kernel. This issue is caused by a race between mbind() and VMA-locked page fault, and may allow a local attacker to crash the system or lead to a kernel information leak.

## Affected

- `linux_kernel >= 6.4, < 6.4.8`
- `linux_kernel = 6.5`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.4.8`

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-11 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-4611.json)