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CVE-2015-8805

nettle: secp256 calculation bug

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Severity

Moderate

Red Hat Product Security

5.8

CVSS 2.0

Review impact separately from score.

Published · February 2, 2016

Updated · November 21, 2025

Description

The ecc_256_modq 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-2015-8803.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 2.0 · 5.8
AV:N/AC:M/Au:N/C:P/I:P/A:N

CWE-358 · Improperly Implemented Security Check for Standard