---
id: CVE-2023-6531
title: >-
  A use-after-free flaw was found in the Linux Kernel due to a race problem in
  the unix garbage collector's deletion of SKB races with
  unix_stream_read_generic() on the socket that the SKB is queued on.
summary: >-
  A use-after-free flaw was found in the Linux Kernel due to a race problem in
  the unix garbage collector's deletion of SKB races with
  unix_stream_read_generic() on the socket that the SKB is queued on.
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-362
  - CWE-362
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 6.7
  - linux_kernel = 6.7
  - enterprise_linux = 9.0
patched:
  - linux_kernel 6.7
published: '2024-01-21'
updated: '2026-08-06'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-6531'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2024:2394'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2023-6531'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2253034'
    label: secalert@redhat.com
  - url: >-
      https://lore.kernel.org/all/c716c88321939156909cfa1bd8b0faaf1c804103.1701868795.git.asml.silence@gmail.com/
    label: secalert@redhat.com
  - url: >-
      http://packetstormsecurity.com/files/176533/Linux-Broken-Unix-GC-Interaction-Use-After-Free.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2024:2394'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/security/cve/CVE-2023-6531'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2253034'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lore.kernel.org/all/c716c88321939156909cfa1bd8b0faaf1c804103.1701868795.git.asml.silence@gmail.com/
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00224
epssPercentile: 0.13327
ingestedAt: '2026-08-06T23:06:28.995Z'
---

## Overview

A use-after-free flaw was found in the Linux Kernel due to a race problem in the unix garbage collector's deletion of SKB races with unix_stream_read_generic() on the socket that the SKB is queued on.

## Affected

- `linux_kernel < 6.7`
- `linux_kernel = 6.7`
- `enterprise_linux = 9.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.7`