---
id: CVE-2022-34918
title: An issue was discovered in the Linux kernel through 5.18.9
summary: >-
  An issue was discovered in the Linux kernel through 5.18.9. A type confusion
  bug in nft_set_elem_init (leading to a buffer overflow) could be used by a
  local attacker to escalate privileges, a different vulnerability than
  CVE-2022-32250.…
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-843
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.1, < 4.14.316'
  - 'linux_kernel >= 4.15, < 4.19.284'
  - 'linux_kernel >= 4.20, < 5.4.244'
  - 'linux_kernel >= 5.5, < 5.10.130'
  - 'linux_kernel >= 5.11, < 5.15.54'
  - 'linux_kernel >= 5.16, < 5.18.11'
  - debian_linux = 11.0
  - ubuntu_linux = 14.04
  - ubuntu_linux = 16.04
  - ubuntu_linux = 18.04
  - ubuntu_linux = 20.04
  - ubuntu_linux = 22.04
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h410s_firmware
  - h410c_firmware
patched:
  - linux_kernel 5.18.11
published: '2022-07-04'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T17:17:40.583'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-34918'
references:
  - url: >-
      http://packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.html
    label: cve@mitre.org
  - url: >-
      http://packetstormsecurity.com/files/168543/Netfilter-nft_set_elem_init-Heap-Overflow-Privilege-Escalation.html
    label: cve@mitre.org
  - url: 'http://www.openwall.com/lists/oss-security/2022/07/05/1'
    label: cve@mitre.org
  - url: 'http://www.openwall.com/lists/oss-security/2022/08/06/5'
    label: cve@mitre.org
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6
    label: cve@mitre.org
  - url: >-
      https://lore.kernel.org/netfilter-devel/cd9428b6-7ffb-dd22-d949-d86f4869f452%40randorisec.fr/T/#u
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20220826-0004/'
    label: cve@mitre.org
  - url: 'https://www.debian.org/security/2022/dsa-5191'
    label: cve@mitre.org
  - url: 'https://www.openwall.com/lists/oss-security/2022/07/02/3'
    label: cve@mitre.org
  - url: 'https://www.randorisec.fr/crack-linux-firewall/'
    label: cve@mitre.org
  - url: >-
      http://packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      http://packetstormsecurity.com/files/168543/Netfilter-nft_set_elem_init-Heap-Overflow-Privilege-Escalation.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2022/07/05/1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2022/08/06/5'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lore.kernel.org/netfilter-devel/cd9428b6-7ffb-dd22-d949-d86f4869f452%40randorisec.fr/T/#u
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20220826-0004/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2022/dsa-5191'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.openwall.com/lists/oss-security/2022/07/02/3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.randorisec.fr/crack-linux-firewall/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-806742.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - exploit-available
  - cve.org
epss: 0.05451
epssPercentile: 0.92706
exploits:
  github: 5
  githubRepos:
    - 'https://github.com/randorisec/CVE-2022-34918-LPE-PoC'
    - 'https://github.com/merlinepedra25/CVE-2022-34918-LPE-PoC'
    - 'https://github.com/merlinepedra/CVE-2022-34918-LPE-PoC'
  metasploit:
    - exploit/linux/local/netfilter_nft_set_elem_init_privesc
  checkedAt: '2026-10-23T21:41:44.063Z'
exploitAvailable: true
ingestedAt: '2026-10-14T17:44:53.599Z'
---

## Overview

An issue was discovered in the Linux kernel through 5.18.9. A type confusion bug in nft_set_elem_init (leading to a buffer overflow) could be used by a local attacker to escalate privileges, a different vulnerability than CVE-2022-32250. (The attacker can obtain root access, but must start with an unprivileged user namespace to obtain CAP_NET_ADMIN access.) This can be fixed in nft_setelem_parse_data in net/netfilter/nf_tables_api.c.

## Affected

- `linux_kernel >= 4.1, < 4.14.316`
- `linux_kernel >= 4.15, < 4.19.284`
- `linux_kernel >= 4.20, < 5.4.244`
- `linux_kernel >= 5.5, < 5.10.130`
- `linux_kernel >= 5.11, < 5.15.54`
- `linux_kernel >= 5.16, < 5.18.11`
- `debian_linux = 11.0`
- `ubuntu_linux = 14.04`
- `ubuntu_linux = 16.04`
- `ubuntu_linux = 18.04`
- `ubuntu_linux = 20.04`
- `ubuntu_linux = 22.04`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h410s_firmware`
- `h410c_firmware`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.18.11`