Vulnerability
Sudo Heap-Based Buffer Overflow Vulnerability
Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation.
Apply updates per vendor instructions.
CISA description: “Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation.”
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HStatistically about to be weaponized — top-tier triage urgency.
No VEX statements published for CVE-2021-3156. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.
Active exploitation with total impact on essential/support systems