KEV Entry

CVE-2021-3493

Known Exploited Vulnerability Entry Previdian

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Entry Details
Confirmed Exploited

CVE-2021-3493

2022-10-20 02:00 CEST

Timestamps

2022-10-20

2022-10-20

Scope

The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on... | Affected: Ubuntu / linux kernel | CVSS: 8.8 (HIGH) | EPSS: 0.49166 | Used in malware: unknown | Not yet in CISA KEV: False

References
  • {'id': 'CVE-2021-3493', 'url': 'https://www.cve.org/CVERecord?id=CVE-2021-3493'}
  • {'id': 'previdian', 'url': 'https://previdian.com/CVE-2021-3493'}

dd5dcca1-876d-4a1d-a270-9da9f10fa3a5

Previdian
caeb2787-0d58-4236-9039-7c86c3e566f3

2026-10-02 09:11 CEST

2026-10-02 09:11 CEST

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
public_report previdian successful_exploitation 0.70
View details 
{
  "added_date": "2022-10-20T00:00:00.000Z",
  "ahead_of_cisa_kev": null,
  "cve_id": "CVE-2021-3493",
  "cvss_estimated": false,
  "cvss_score": 8.8,
  "cvss_severity": "HIGH",
  "epss_percentile": 0.98851,
  "epss_score": 0.49166,
  "feed": "Previdian (previdian.com)",
  "ghsa_id": null,
  "not_yet_in_cisa_kev": false,
  "previous_ids": [],
  "product": "linux kernel",
  "title": "The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on...",
  "used_in_malware": "unknown",
  "vendor": "Ubuntu",
  "virtual_patch": false,
  "vulnerability_id": "CVE-2021-3493"
}
 -
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