April 6, 2022 · Applied Cybernetics Group
CVE-2021-3156 — Sudo Sudo
Sudo Heap-Based Buffer Overflow Vulnerability
- Added to KEV
2022-04-06- Federal due date
2022-04-27- Vendor
- Sudo
- Product
- Sudo
- EPSS
- 99.8th percentile (score 0.926, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-3156
CISA short 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.