CVE-2021-3156

Known Exploited Vulnerability Entry External Catalog

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Entry Details

CVE-2021-3156

Confirmed

Yes

2022-04-06 00:00 UTC

Timestamps

2022-04-06

2022-04-06

Scope

KEV entry: Sudo Heap-Based Buffer Overflow Vulnerability | Affected: Sudo / Sudo | Description: Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation. | Required action: Apply updates per vendor instructions. | Due date: 2022-04-27 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-3156

References
  • {'id': 'CVE-2021-3156', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-3156'}

b6557656-10d6-4e76-9711-368565a4bd59

405284c2-e461-4670-8979-7fd2c9755a60

2026-02-02 12:27 UTC

2026-02-06 07:17 UTC

Evidence (1)
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-122",
    "CWE-193"
  ],
  "date_added": "2022-04-06",
  "due_date": "2022-04-27",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "Sudo",
  "vendorProject": "Sudo",
  "vulnerabilityName": "Sudo Heap-Based Buffer Overflow Vulnerability"
}
 -
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