CVE-2021-3156
Sudo Heap-Based Buffer Overflow Vulnerability
n/a
CVSS
99.3%
EPSS (exploit prob.)
99.9%
EPSS percentile
Yes
Actively exploited
No
Ransomware use
2022-04-06
Added
Summary
Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation.
Affected software
Vendor: Sudo · Product: Sudo
Weakness types (CWE):
CWE-122CWE-193
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in Sudo
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2025-32463 | Sudo Inclusion of Functionality from Untrusted Control Sphere Vulnerability | 54.9% | Yes |
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