---
id: "CVE-2022-0185"
kind: "vulnerability"
aliases: ["CVE-2022-0185"]
title: "A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context\u2026"
severity: "high"
cvss: 8.4
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "linux kernel", "fixed": ["5.4.173"], "affected": ">= 5.1, < 5.4.173", "ecosystem": "vendor"}, {"name": "linux kernel", "fixed": ["5.10.93"], "affected": ">= 5.5, < 5.10.93", "ecosystem": "vendor"}, {"name": "linux kernel", "fixed": ["5.15.16"], "affected": ">= 5.11, < 5.15.16", "ecosystem": "vendor"}, {"name": "linux kernel", "fixed": ["5.16.2"], "affected": ">= 5.16, < 5.16.2", "ecosystem": "vendor"}, {"name": "netapp h410c firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "netapp h300s firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "netapp h500s firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "netapp h700s firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "netapp h300e firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "netapp h500e firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "netapp h700e firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "netapp h410s firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "Linux Kernel", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "kubernetes", "linux", "self-hosted"]
not_affected_if: ["default-config"]
published_at: "2022-02-11T18:15:10+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-24T00:09:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-0185", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-0185", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context…

The Linux kernel has a heap-based buffer overflow in the legacy_parse_param function in its Filesystem Context code. An attacker who can mount a filesystem can overflow kernel memory and escalate to root.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:linux kernel affected >= 5.1, < 5.4.173 fixed 5.4.173
- vendor:linux kernel affected >= 5.5, < 5.10.93 fixed 5.10.93
- vendor:linux kernel affected >= 5.11, < 5.15.16 fixed 5.15.16
- vendor:linux kernel affected >= 5.16, < 5.16.2 fixed 5.16.2
- vendor:netapp h410c firmware affected ? fixed ?
- vendor:netapp h300s firmware affected ? fixed ?
- vendor:netapp h500s firmware affected ? fixed ?
- vendor:netapp h700s firmware affected ? fixed ?
- vendor:netapp h300e firmware affected ? fixed ?
- vendor:netapp h500e firmware affected ? fixed ?
- vendor:netapp h700e firmware affected ? fixed ?
- vendor:netapp h410s firmware affected ? fixed ?
- vendor:Linux Kernel affected ? fixed ?

## Fix

Apply the Linux kernel update from your distribution or vendor that fixes CVE-2022-0185; discontinue use of unpatched systems if no update is available.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-0185
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2022-0185

## From the sources

A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system.

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