CVE-2021-3580: Debian Linux

High severity, CVSS 7.5. EPSS: 2.7% chance of exploitation in the next 30 days.

A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.

Affected products

• Debian Debian Linux: version 9.0 only
• Netapp Ontap Select Deploy Administration Utility: affected versions not specified
• Nettle Project Nettle: before 3.7.3 (fixed in 3.7.3)
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only

Published 2021-08-05. Last modified 2026-06-17.