CVE-2022-0185

CRITICALNVD 8.49.0
EchelonGraph scoreHIGH confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-08-21), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.4 retained for reference. The 9.0 is the floor for confirmed exploitation, not an impact rating: this CVE's impact severity (EG Severity) is CVSS 8.4 HIGH under NVD CVSS v3. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: CISA Known Exploited Vulnerabilities catalog, EPSS, NVD CVSS v3
Trending — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low or medium mission impact
CISA-KEV: ExploitedEPSS PROB: 25%CVSS: 8.4Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
8.4
EG Score
9.0CRITICALhigh confidence
EG Risk
78
EG Risk 78/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity84% × 45%
Impact severity (EG Severity): CVSS 8.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation100% × 40%
Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Attend at medium and Act at high mission impact.
Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.
EPSS PROB
25%
EPSS %ILE
97th
KEV
⚠ Exploited

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is the CISA KEV floor for confirmed exploitation, not an impact rating: its impact severity (EG Severity) is CVSS 8.4 HIGH.

EG Severity
8.4 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
25% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-22). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Attend at medium mission impactTrack at low, Attend at medium and Act at high mission impact.CISA BOD 26-04: 3 days & forensic triage if the affected system is publicly exposed; 14 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Attend at medium and Act at high mission impact.

A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days & forensic triage if the affected system is publicly exposed; 14 days if it is not.

In CISA KEV yes (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

CISA required action“Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.”

Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. 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

Published

February 11, 2022

Last Modified

November 6, 2025

Advisory Details (5)

Auto-updated Oct 19, 2026
⚠️ Actively exploited (CISA KEV, CISA Vulnrichment). Patch available.
Web page

Will's Root: CVE-2022-0185 - Winning a $31337 Bounty after Pwning Ubuntu and Escaping Google's KCTF Containers

https://www.willsroot.io/2022/01/cve-2022-0185.html
Web page

oss-security - Linux kernel: Heap buffer overflow in fs_context.c since version 5.1

https://www.openwall.com/lists/oss-security/2022/01/18/7
Web page

GitHub - Crusaders-of-Rust/CVE-2022-0185: CVE-2022-0185 · GitHub

https://github.com/Crusaders-of-Rust/CVE-2022-0185
Web page

vfs: fs_context: fix up param length parsing in legacy_parse_param - kernel/git/torvalds/linux.git - Linux kernel source tree

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2

Patch Availability(9)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuibm (5.4.0-1009) @ focal2026-10-21ubuntu
ubuntulinux-buildinfo-5.13.0-1015-raspi (5.13.0-1015.17) @ impish2026-10-21ubuntu
ubuntulinux-image-unsigned-5.13.0-1010-intel (5.13.0-1010.10) @ focal2026-10-21ubuntu
redhatredhat-virtualization-host-0:4.4.10-202202081536_8.52022-02-15redhat
redhatkpatch-patch2022-01-24redhat
redhatkernel-0:4.18.0-305.34.2.el8_42022-01-19redhat
redhatkernel-rt-0:4.18.0-348.12.2.rt7.143.el8_52022-01-19redhat
redhatkernel-0:4.18.0-348.12.2.el8_52022-01-19redhat
redhatkernel-rt-0:4.18.0-305.34.2.rt7.107.el8_42022-01-19redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.46-4 ... 5.10.92-1~bpo10+1 (6 versions)
  • every version up to 5.10.92-1: fixed in 5.10.92-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.15.15-1: fixed in 5.15.15-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.15.15-1: fixed in 5.15.15-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.15.15-1: fixed in 5.15.15-1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(6)

Data Freshness Timeline

(refreshed 18× in last 7d / 175× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 1,079 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 980 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:28 UTCEPSS rescoreEPSS 25% · 97th percentile
  2. 2026-10-22 17:36 UTCEG score recompute
  3. 2026-10-22 17:36 UTCVendor advisory
  4. 2026-10-22 16:29 UTCEPSS rescoreEPSS 25% · 97th percentile
  5. 2026-10-21 16:28 UTCEPSS rescoreEPSS 25% · 97th percentile
  6. 2026-10-21 16:23 UTCEG score recompute
  7. 2026-10-21 16:23 UTCVendor advisory
  8. 2026-10-20 16:28 UTCEPSS rescoreEPSS 25% · 97th percentile
  9. 2026-10-20 15:10 UTCEG score recompute
  10. 2026-10-20 15:10 UTCVendor advisory
  11. 2026-10-19 16:28 UTCEPSS rescoreEPSS 25% · 97th percentile
  12. 2026-10-19 13:58 UTCEG score recompute
  13. 2026-10-19 13:58 UTCVendor advisory
  14. 2026-10-18 12:44 UTCVendor advisory
  15. 2026-10-18 08:48 UTCEG score recompute
  16. 2026-10-17 16:29 UTCEPSS rescoreEPSS 25% · 97th percentile
  17. 2026-10-17 11:30 UTCEG score recompute
  18. 2026-10-17 11:30 UTCVendor advisory
  19. 2026-10-16 16:34 UTCEPSS rescoreEPSS 25% · 97th percentile
  20. 2026-10-16 10:19 UTCEG score recompute
  21. 2026-10-16 10:19 UTCVendor advisory
  22. 2026-10-15 16:28 UTCEPSS rescoreEPSS 25% · 97th percentile
  23. 2026-10-15 09:04 UTCEG score recompute
  24. 2026-10-15 09:04 UTCVendor advisory
  25. 2026-10-14 16:29 UTCEPSS rescoreEPSS 25% · 97th percentile
Show 74 more
  1. 2026-10-14 07:51 UTCEG score recompute
  2. 2026-10-14 07:51 UTCVendor advisory
  3. 2026-10-13 16:28 UTCEPSS rescoreEPSS 25% · 97th percentile
  4. 2026-10-13 06:38 UTCVendor advisory
  5. 2026-10-12 19:04 UTCEG score recompute
  6. 2026-10-12 05:24 UTCVendor advisory
  7. 2026-10-12 01:09 UTCVendor advisory
  8. 2026-10-11 20:52 UTCEG score recompute
  9. 2026-10-11 20:52 UTCVendor advisory
  10. 2026-10-11 16:38 UTCEG score recompute
  11. 2026-10-11 16:38 UTCVendor advisory
  12. 2026-10-11 13:44 UTCEPSS rescoreEPSS 25% · 97th percentile
  13. 2026-10-11 12:24 UTCEG score recompute
  14. 2026-10-11 12:24 UTCVendor advisory
  15. 2026-10-11 08:08 UTCVendor advisory
  16. 2026-10-11 03:54 UTCVendor advisory
  17. 2026-10-10 23:39 UTCEG score recompute
  18. 2026-10-10 23:39 UTCVendor advisory
  19. 2026-10-10 19:56 UTCEPSS rescoreEPSS 25% · 97th percentile
  20. 2026-10-10 19:24 UTCVendor advisory
  21. 2026-10-10 15:09 UTCVendor advisory
  22. 2026-10-10 10:55 UTCVendor advisory
  23. 2026-10-10 06:40 UTCVendor advisory
  24. 2026-10-10 02:26 UTCVendor advisory
  25. 2026-10-09 22:10 UTCEG score recompute
  26. 2026-10-09 22:10 UTCVendor advisory
  27. 2026-10-09 20:04 UTCEPSS rescoreEPSS 25% · 97th percentile
  28. 2026-10-09 17:56 UTCVendor advisory
  29. 2026-10-09 13:42 UTCVendor advisory
  30. 2026-10-09 09:28 UTCVendor advisory
  31. 2026-10-09 05:13 UTCVendor advisory
  32. 2026-10-09 00:59 UTCVendor advisory
  33. 2026-10-08 20:45 UTCEG score recompute
  34. 2026-10-08 20:45 UTCVendor advisory
  35. 2026-10-08 16:40 UTCEPSS rescoreEPSS 25% · 97th percentile
  36. 2026-10-08 16:31 UTCVendor advisory
  37. 2026-10-08 12:14 UTCVendor advisory
  38. 2026-10-08 08:00 UTCVendor advisory
  39. 2026-10-08 03:46 UTCEG score recompute
  40. 2026-10-08 03:46 UTCVendor advisory
  41. 2026-10-07 23:45 UTCEPSS rescoreEPSS 25% · 97th percentile
  42. 2026-10-07 23:31 UTCVendor advisory
  43. 2026-10-07 19:16 UTCVendor advisory
  44. 2026-10-07 15:02 UTCVendor advisory
  45. 2026-10-07 10:48 UTCVendor advisory
  46. 2026-10-07 06:33 UTCVendor advisory
  47. 2026-10-07 02:19 UTCVendor advisory
  48. 2026-10-06 22:04 UTCVendor advisory
  49. 2026-10-06 17:50 UTCEG score recompute
  50. 2026-10-06 17:50 UTCVendor advisory
  51. 2026-10-06 15:14 UTCEPSS rescoreEPSS 25% · 97th percentile
  52. 2026-10-06 13:36 UTCVendor advisory
  53. 2026-10-06 09:22 UTCVendor advisory
  54. 2026-10-06 05:08 UTCVendor advisory
  55. 2026-10-06 00:53 UTCVendor advisory
  56. 2026-10-05 20:38 UTCEG score recompute
  57. 2026-10-05 20:38 UTCVendor advisory
  58. 2026-10-05 17:40 UTCEPSS rescoreEPSS 25% · 97th percentile
  59. 2026-10-05 16:25 UTCVendor advisory
  60. 2026-10-05 12:11 UTCVendor advisory
  61. 2026-10-05 07:57 UTCVendor advisory
  62. 2026-10-05 03:43 UTCVendor advisory
  63. 2026-10-04 23:29 UTCVendor advisory
  64. 2026-10-04 19:15 UTCVendor advisory
  65. 2026-10-04 15:01 UTCVendor advisory
  66. 2026-10-04 10:47 UTCVendor advisory
  67. 2026-10-04 06:31 UTCVendor advisory
  68. 2026-10-04 02:16 UTCVendor advisory
  69. 2026-10-03 22:02 UTCVendor advisory
  70. 2026-10-03 17:47 UTCEG score recompute
  71. 2026-10-03 17:47 UTCVendor advisory
  72. 2026-10-03 14:22 UTCEPSS rescoreEPSS 25% · 97th percentile
  73. 2026-10-03 13:33 UTCVendor advisory
  74. 2026-10-03 09:18 UTCVendor advisory

Publicly available exploits

(6 references)

Public exploit code is referenced for this CVE (6 GitHub PoCs). Defenders should treat patch urgency accordingly.

  • GitHub PoCdcheng69/CVE-2022-0185-Case-Study
    Published Apr 15, 2024
    Open source ↗
  • GitHub PoCfeatherL/CVE-2022-0185-exploit
    Published Apr 14, 2022

    CVE-2022-0185 exploit

    Open source ↗
  • GitHub PoCveritas501/CVE-2022-0185-PipeVersion
    Published Apr 5, 2022

    CVE-2022-0185 exploit rewritten with pipe primitive

    Open source ↗
  • GitHub PoCchenaotian/CVE-2022-0185
    Published Feb 18, 2022

    CVE-2022-0185 POC and Docker and Analysis write up

    Open source ↗
  • GitHub PoCdiscordianfish/cve-2022-0185-crash-poc
    Published Jan 26, 2022
    Open source ↗
  • GitHub PoCCrusaders-of-Rust/CVE-2022-0185
    Published Jan 19, 2022

    CVE-2022-0185

    Open source ↗

Frequently asked(6)

What is CVE-2022-0185?
CVE-2022-0185 is a critical-severity vulnerability; its CVE record was published on February 11, 2022. A heap-based buffer overflow flaw was found in the way the legacyparseparam 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 CAPSYSADMIN…
When was the CVE record for CVE-2022-0185 published?
The CVE record for CVE-2022-0185 was published on February 11, 2022. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 6, 2025; the record at its source may have been updated since.
Is CVE-2022-0185 actively exploited?
Yes. CISA added CVE-2022-0185 to the Known Exploited Vulnerabilities catalog on August 21, 2024, affecting Linux Kernel. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is available. Apply it.
What is the CVSS score of CVE-2022-0185?
CVE-2022-0185 has a CVSS v3 base score of 8.4 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
Which products are affected by CVE-2022-0185?
CVE-2022-0185 affects Linux Kernel. The affected packages EchelonGraph has on record, with version ranges, are listed in the Affected Packages section of this page.
How do I remediate CVE-2022-0185?
A fix for CVE-2022-0185 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-0185 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-0185

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