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

CISA Known Exploited Vulnerabilities

Name

Linux Kernel Heap-Based Buffer Overflow Vulnerability

Vendor

Linux

Product

Kernel

Added to the catalog

2024-08-21

Due date for US federal agencies

2024-09-11

Weaknesses

CWE-190

Catalog version

2026.10.30

Linux kernel contains a heap-based buffer overflow vulnerability in the legacy_parse_param function in the Filesystem Context functionality. This allows an attacker to open a filesystem that does not support the Filesystem Context API and ultimately escalate privileges.

Required action (CISA)

Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=722d94847de2
• https://nvd.nist.gov/vuln/detail/CVE-2022-0185

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2022-02-11T18:15:10.890

Last modified

2026-06-17T04:20:06.923

Weaknesses

CWE-190, CWE-191

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.

References

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2 (Mailing List, Patch)
• https://github.com/Crusaders-of-Rust/CVE-2022-0185 (Exploit, Third Party Advisory)
• https://security.netapp.com/advisory/ntap-20220225-0003/ (Third Party Advisory)
• https://www.openwall.com/lists/oss-security/2022/01/18/7 (Mailing List, Patch, Third Party Advisory)
• https://www.willsroot.io/2022/01/cve-2022-0185.html (Exploit, Third Party Advisory)
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2 (Mailing List, Patch)
• https://github.com/Crusaders-of-Rust/CVE-2022-0185 (Exploit, Third Party Advisory)
• https://security.netapp.com/advisory/ntap-20220225-0003/ (Third Party Advisory)
• https://www.openwall.com/lists/oss-security/2022/01/18/7 (Mailing List, Patch, Third Party Advisory)
• https://www.willsroot.io/2022/01/cve-2022-0185.html (Exploit, Third Party Advisory)
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-0185 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:41:59.479Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2022-0185

CVE record

Assigner

redhat

State

PUBLISHED

Published

2022-02-11T17:40:57.000Z

Updated

2025-10-21T23:15:46.536Z

Problem types

Integer Overflow or Wraparound CWE-190

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.

References

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2
• https://github.com/Crusaders-of-Rust/CVE-2022-0185
• https://www.openwall.com/lists/oss-security/2022/01/18/7
• https://www.willsroot.io/2022/01/cve-2022-0185.html
• https://security.netapp.com/advisory/ntap-20220225-0003/

Read on 2026-11-03T01:09:25.655Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2022/0xxx/CVE-2022-0185.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

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