CVE-2021-3156
Sudo Heap-Based Buffer Overflow Vulnerability
Sudo · Sudo
Vulnerability details
Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation.
Added to CISA KEV: 2022-04-06
Ransomware campaign use: Unknown
CISA due date: 2022-04-27
Defensive guidance from CISA
Apply updates per vendor instructions.
This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.
Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC