CVE-2021-3156
CISA KEVPublished April 6, 2022 · Updated April 3, 2026
high
Official Description+
Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation.
Affected Products
| Vendor | Product |
|---|---|
| Sudo | Sudo |
Patch Status
Patch by 2022-04-27
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2021-3156.