---
id: CVE-2023-1829
title: "A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation.\_The tcindex_delete function which does not properly deactivate filters in case of a perfect…"
summary: "A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation.\_The tcindex_delete function which does not properly deactivate filters in case of a perfect…"
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: linux
product: linux_kernel
affected:
  - linux_kernel < 4.14.308
  - 'linux_kernel >= 4.15, < 4.19.276'
  - 'linux_kernel >= 4.20, < 5.4.235'
  - 'linux_kernel >= 5.5, < 5.10.173'
  - 'linux_kernel >= 5.11, < 5.15.100'
  - 'linux_kernel >= 5.16, < 6.1.18'
  - 'linux_kernel >= 6.2, < 6.2.5'
patched:
  - linux_kernel 6.2.5
published: '2023-04-12'
updated: '2026-07-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-1829'
references:
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8c710f75256bb3cf05ac7b1672c82b92c43f3d28
    label: cve-coordination@google.com
  - url: 'https://kernel.dance/#8c710f75256bb3cf05ac7b1672c82b92c43f3d28'
    label: cve-coordination@google.com
  - url: 'https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html'
    label: cve-coordination@google.com
  - url: 'https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html'
    label: cve-coordination@google.com
  - url: 'https://security.netapp.com/advisory/ntap-20230601-0001/'
    label: cve-coordination@google.com
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8c710f75256bb3cf05ac7b1672c82b92c43f3d28
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://kernel.dance/#8c710f75256bb3cf05ac7b1672c82b92c43f3d28'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20230601-0001/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - exploit-available
epss: 0.01037
epssPercentile: 0.62472
ingestedAt: '2026-07-29T15:48:24.362Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/lanleft/CVE-2023-1829'
  checkedAt: '2026-09-24T07:52:49.693Z'
exploitAvailable: true
---

## Overview

A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root.


We recommend upgrading past commit   8c710f75256bb3cf05ac7b1672c82b92c43f3d28 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ .

## Affected

- `linux_kernel < 4.14.308`
- `linux_kernel >= 4.15, < 4.19.276`
- `linux_kernel >= 4.20, < 5.4.235`
- `linux_kernel >= 5.5, < 5.10.173`
- `linux_kernel >= 5.11, < 5.15.100`
- `linux_kernel >= 5.16, < 6.1.18`
- `linux_kernel >= 6.2, < 6.2.5`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.2.5`