---
id: CVE-2022-36123
title: >-
  The Linux kernel before 5.18.13 lacks a certain clear operation for the block
  starting symbol (.bss)
summary: >-
  The Linux kernel before 5.18.13 lacks a certain clear operation for the block
  starting symbol (.bss). This allows Xen PV guest OS users to cause a denial of
  service or gain privileges.
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'
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 5.18.13
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h410s_firmware
  - h410c_firmware
patched:
  - linux_kernel 5.18.13
published: '2022-07-29'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T18:17:01.387'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-36123'
references:
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.13'
    label: cve@mitre.org
  - url: >-
      https://github.com/sickcodes/security/blob/master/advisories/SICK-2022-128.md
    label: cve@mitre.org
  - url: >-
      https://github.com/torvalds/linux/commit/74a0032b8524ee2bd4443128c0bf9775928680b0
    label: cve@mitre.org
  - url: >-
      https://github.com/torvalds/linux/commit/96e8fc5818686d4a1591bb6907e7fdb64ef29884
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20220901-0003/'
    label: cve@mitre.org
  - url: 'https://sick.codes/sick-2022-128'
    label: cve@mitre.org
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.13'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/sickcodes/security/blob/master/advisories/SICK-2022-128.md
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/torvalds/linux/commit/74a0032b8524ee2bd4443128c0bf9775928680b0
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/torvalds/linux/commit/96e8fc5818686d4a1591bb6907e7fdb64ef29884
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20220901-0003/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://sick.codes/sick-2022-128'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-202008.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
  - cve.org
epss: 0.009
epssPercentile: 0.59253
ingestedAt: '2026-10-14T18:47:39.268Z'
---

## Overview

The Linux kernel before 5.18.13 lacks a certain clear operation for the block starting symbol (.bss). This allows Xen PV guest OS users to cause a denial of service or gain privileges.

## Affected

- `linux_kernel < 5.18.13`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h410s_firmware`
- `h410c_firmware`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.18.13`