---
id: CVE-2023-6932
title: >-
  A use-after-free vulnerability in the Linux kernel's ipv4: igmp component can
  be exploited to achieve local privilege escalation.


  A race condition can be exploited to cause a timer be mistakenly registered on
  a RCU read locked object wh…
summary: >-
  A use-after-free vulnerability in the Linux kernel's ipv4: igmp component can
  be exploited to achieve local privilege escalation.


  A race condition can be exploited to cause a timer be mistakenly registered on
  a RCU read locked object wh…
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
  - CWE-416
vendor: debian
product: debian_linux
affected:
  - debian_linux = 10.0
  - linux_kernel < 4.14.332
  - 'linux_kernel >= 4.15, < 4.19.301'
  - 'linux_kernel >= 4.20, < 5.4.263'
  - 'linux_kernel >= 5.5, < 5.10.203'
  - 'linux_kernel >= 5.11, < 5.15.142'
  - 'linux_kernel >= 5.16, < 6.1.66'
  - 'linux_kernel >= 6.2, < 6.6.5'
patched:
  - linux_kernel 6.6.5
published: '2023-12-19'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T23:17:21.020'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-6932'
references:
  - url: >-
      http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
    label: cve-coordination@google.com
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=e2b706c691905fe78468c361aaabc719d0a496f1
    label: cve-coordination@google.com
  - url: 'https://kernel.dance/e2b706c691905fe78468c361aaabc719d0a496f1'
    label: cve-coordination@google.com
  - url: 'https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html'
    label: cve-coordination@google.com
  - url: 'https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html'
    label: cve-coordination@google.com
  - url: >-
      http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=e2b706c691905fe78468c361aaabc719d0a496f1
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://kernel.dance/e2b706c691905fe78468c361aaabc719d0a496f1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html'
    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://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
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-613116.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.00367
epssPercentile: 0.28939
ingestedAt: '2026-10-15T00:02:07.135Z'
---

## Overview

A use-after-free vulnerability in the Linux kernel's ipv4: igmp component can be exploited to achieve local privilege escalation.

A race condition can be exploited to cause a timer be mistakenly registered on a RCU read locked object which is freed by another thread.

We recommend upgrading past commit e2b706c691905fe78468c361aaabc719d0a496f1.

## Affected

- `debian_linux = 10.0`
- `linux_kernel < 4.14.332`
- `linux_kernel >= 4.15, < 4.19.301`
- `linux_kernel >= 4.20, < 5.4.263`
- `linux_kernel >= 5.5, < 5.10.203`
- `linux_kernel >= 5.11, < 5.15.142`
- `linux_kernel >= 5.16, < 6.1.66`
- `linux_kernel >= 6.2, < 6.6.5`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.6.5`