CVE-2022-0185: Linux Kernel Heap-Based Buffer Overflow Vulnerability

Q: How do I fix CVE-2022-0185?

linux kernel: upgrade to 5.4.173, 5.10.93, 5.15.16, 5.16.2; h410c firmware: mitigate or apply the listed mitigation; h300s firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2022-0185 being exploited?

Yes. CVE-2022-0185 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

Q: What does CVE-2022-0185 affect?

CVE-2022-0185 affects linux kernel, h410c firmware, h300s firmware. Severity is high (CVSS 8.4). 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 namesp

Q: How urgent is CVE-2022-0185?

Priority 89/100. High severity; EPSS top 2%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; On your watchlist

Patch now

HIGH 8.4EXPLOITEDWATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2022-0185 is a high-severity flaw (CVSS 8.4) affecting linux kernel, h410c firmware, h300s firmware, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 fla

Why this priority

High severity
EPSS top 2%: very likely to be exploited
Exploited in the wild (CISA KEV)
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	25.2% (top 2%)
CISA exploited list	Yes, fix due 2024-09-11
Weakness	CWE-190, CWE-191
Published	2022-02-11
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: linux · netapp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-02-11 18:15 UTCPublished CVE record published
2024-08-21Exploited Added to the CISA Known Exploited Vulnerabilities list
2024-09-11Deadline CISA due date for US federal agencies to patch
2026-06-17 04:20 UTCUpdated Record last modified

linux linux kernel UPGRADE

Affected: >= 5.1 and < 5.4.173 · >= 5.5 and < 5.10.93 · >= 5.11 and < 5.15.16 · >= 5.16 and < 5.16.2

Fixed in: 5.4.173, 5.10.93, 5.15.16, 5.16.2

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp h410c firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp h300s firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp h500s firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp h700s firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp h300e firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · nemo · FIXED · 6.8.0-1.fc46 · FEDORA-2026-0edead723f · source

sudo dnf upgrade --advisory=FEDORA-2026-0edead723f

Fedora ELN · composer · FIXED · 2.11.1-1.eln159 · FEDORA-2026-cb4f992456 · source

sudo dnf upgrade --advisory=FEDORA-2026-cb4f992456

Ubuntu 20.04 · linux · FIXED · 5.4.0-96.109

sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "5.4.0-96.109" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 22.04 · linux · NOT AFFECTED

Ubuntu 24.04 · linux · NOT AFFECTED

Ubuntu 24.10 · linux · NOT AFFECTED

Ubuntu 25.04 · linux · NOT AFFECTED

Debian 12 · linux · FIXED · 5.15.15-1

sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "5.15.15-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · linux · FIXED · 5.15.15-1

sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "5.15.15-1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 8 · kernel-rt · FIXED · kernel-rt-4.18.0-348.12.2.rt7.143.el8_5

sudo dnf upgrade --advisory=RHSA-2022:0176 rpm -q kernel-rt

RHEL 8 · kernel · FIXED · kernel-4.18.0-348.12.2.el8_5

sudo dnf upgrade --advisory=RHSA-2022:0188 rpm -q kernel

RHEL 8.4 Extended Update Support · kernel-rt · FIXED · kernel-rt-4.18.0-305.34.2.rt7.107.el8_4

sudo dnf upgrade --advisory=RHSA-2022:0187 rpm -q kernel-rt

RHEL 8.4 Extended Update Support · kernel · FIXED · kernel-4.18.0-305.34.2.el8_4

sudo dnf upgrade --advisory=RHSA-2022:0186 rpm -q kernel

RHEL 6 · kernel · NOT AFFECTED

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2023-070 · source

sudo dnf update --advisory=ALAS2023-2023-070

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: Crusaders-of-Rust/CVE-2022-0185 (378 stars)
GitHub PoC: chenaotian/CVE-2022-0185 (37 stars)
GitHub PoC: veritas501/CVE-2022-0185-PipeVersion (16 stars)
Write-up: git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2
Write-up: www.willsroot.io/2022/01/cve-2022-0185.html

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-0185?

linux kernel: upgrade to 5.4.173, 5.10.93, 5.15.16, 5.16.2; h410c firmware: mitigate or apply the listed mitigation; h300s firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-0185 being exploited?

Yes. CVE-2022-0185 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2022-0185 affect?

CVE-2022-0185 affects linux kernel, h410c firmware, h300s firmware. Severity is high (CVSS 8.4). 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 namesp

How urgent is CVE-2022-0185?

Priority 89/100. High severity; EPSS top 2%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; On your watchlist

Software pages

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References

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