---
id: CVE-2022-1012
title: >-
  A memory leak problem was found in the TCP source port generation algorithm in
  net/ipv4/tcp.c due to the small table perturb size
summary: >-
  A memory leak problem was found in the TCP source port generation algorithm in
  net/ipv4/tcp.c due to the small table perturb size. This flaw may allow an
  attacker to information leak and may cause a denial of service problem.
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'
cwe:
  - CWE-401
  - CWE-401
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 5.18
  - linux_kernel = 5.18
patched:
  - linux_kernel 5.18
published: '2022-08-05'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:17:15.887'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-1012'
references:
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2064604'
    label: secalert@redhat.com
  - url: 'https://lore.kernel.org/lkml/20220427065233.2075-1-w%401wt.eu/T/'
    label: secalert@redhat.com
  - url: 'https://security.netapp.com/advisory/ntap-20221020-0006/'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2064604'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lore.kernel.org/lkml/20220427065233.2075-1-w%401wt.eu/T/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20221020-0006/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-561322.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: 0.04117
epssPercentile: 0.90568
ingestedAt: '2026-10-14T13:30:58.416Z'
---

## Overview

A memory leak problem was found in the TCP source port generation algorithm in net/ipv4/tcp.c due to the small table perturb size. This flaw may allow an attacker to information leak and may cause a denial of service problem.

## Affected

- `linux_kernel < 5.18`
- `linux_kernel = 5.18`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.18`