No exploitation reportedFix available

CVE-2015-8803

No exploitation reported by the sources we read.

Published2016-02-23
WeaknessCWE-254 · CWE-310

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2016-02-2319:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-8803?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-8803?format=csv
TAXII collection of exploited CVEs
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Versions per branch

NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
14.4	= 14.04	no fix published	NVD
15.10	= 15.10	no fix published	NVD

Opensuse

Branch	Affected	Fixed in	Source
13.1	= 13.1	no fix published	NVD
13.2	= 13.2	no fix published	NVD

Nettle project nettle

Branch	Affected	Fixed in	Source
3.1	≤ 3.1.1	no fix published	NVD

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

git.lysator.liu.sePatch
lists.lysator.liu.seVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.09.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-254, CWE-310read 2026-10-23
FIRST EPSSEPSS score4.2 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2016-02-23
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2015-8803?

Is CVE-2015-8803 actively exploited?

Active exploitation of CVE-2015-8803 has not been confirmed. Its EPSS score was 4.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2015-8803?

CVE-2015-8803 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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