CVE-2015-8803: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 4.2% chance of exploitation in the next 30 days.

The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-256 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors, a different vulnerability than CVE-2015-8805.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 15.10 only
• Nettle Project Nettle: up to and including 3.1.1
• Opensuse Leap: version 42.1 only
• Opensuse Opensuse: version 13.1 only; version 13.2 only

Published 2016-02-23. Last modified 2026-06-17.