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CVE Watch—

CVE-2021-3156

Sudo Heap-Based Buffer Overflow Vulnerability

CVSS

—

No CVSS

EPSS

100.0%

p100

KEV

YES

Apr 6, 2022

Exploit Today

80

0-100

Published: — · Last modified: —

EPSS · 30d
99.3%EPSS · 30 days100.0%
2026-08-022026-08-30
KEV catalog record

Product

Sudo / Sudo

Vulnerability

Sudo Heap-Based Buffer Overflow Vulnerability

Added to KEV

Apr 6, 2022

Remediate by

Apr 27, 2022

Known ransomware use

No

Summary 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.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-3156

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