Coverage › CVE-2021-3156
CVE-2021-3156 Unmapped
Sudo Heap-Based Buffer Overflow Vulnerability
- Vendor / product
- Sudo — Sudo
- Description (CISA)
- Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation.
- Added to KEV
- 2022-04-06
- Due date
- 2022-04-27
- Required action
- Apply updates per vendor instructions.
- Known ransomware use
- Unknown
- CWE
- CWE-122, CWE-193
- CISA notes
- https://nvd.nist.gov/vuln/detail/CVE-2021-3156
- Elsewhere
- cve.org · NVD · CISA KEV · JSON
ATT&CK techniques
No public source states how this vulnerability is exploited in ATT&CK terms.
The only authoritative CVE → ATT&CK mapping in the open — CTID's Mappings Explorer, pinned to a KEV snapshot of 2025-07-28 and ATT&CK 16.1 — does not include CVE-2021-3156. CISA's catalogue carries no technique field. kevmap does not infer techniques from the CWE (CWE-122, CWE-193) — here is why — and does not guess.
This page will change state automatically if a mapping is published. What is shown above is everything CISA publishes about the entry.