vciy

CVE-2016-6489

INDEX BUILT · 2026-09-20

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The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channel attack.

CVE-2016-64893 of 4 sources documented this
28

rank 28 = 1 + 19 + 0 + 8 + 0

rank@v1 · scheduled

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.05007  ·  without this subject the record ranks 27

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 7.5, from NVD  ·  without this subject the record ranks 9

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

no persisting rise in 365 days  ·  without this subject the record ranks 28

How much of the world it touches

NVD CPE configurations

9 products in the CPE ranges  ·  without this subject the record ranks 20

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 28

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$153,000over the next 30 days, if this record is yours
Movement-$502,000on 2025-03-30, the last material move, 1 year, 2 months before this reading
Basisassumeda published average, not your estate

$153,000 = $4.99M incident cost x 0.6121449559255632 exposure x 0.05007 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.05007EPSSNOT IN KEVas of 2026-09-20
Severity7.5 HIGHreceipt
Harmunauthenticated · networkreceipt
Exploitationnone in held sources
Defenseunaffected versions publishedreceipt
Movementrisenreceipt
PLATEAU10Minimal movement since 2025-03-30, 454 days at 0.05, as of 2026-06-27. arc-rules@v1

Foresight · where to check next

No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.

Color is a claim, not decoration:the hostile worldthe defenseno signal

Check a version against this record

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What counts as a move

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachnetwork-reachable · no privileges required · no user interaction · low attack complexityreceipt
ImpactComplete confidentiality lossreceipt
Scored fromCVSS v3.1 · NVD's vectorreceipt
Weakness classCWE-203 Observable Discrepancyreceipt
Published consequencesCWE-203: Confidentiality, Access Control: Read Application Data, Bypass Protection Mechanism; Confidentiality: Read Application Data[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

First unaffected version, by branchproject nettle 3.3receipt
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Nothing observed in held sources.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, NVD7.5 HIGHreceipt
Exploit probability0.05007 · top 8% of all CVEsreceipt
Blast breadth6 products across 3 vendorsderived
Assigned bydebianreceipt
Recorded changes22 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesNettle project nettle; Canonical ubuntu linux; Redhat enterprise linux desktop; and 3 morereceipt
Published rangesredhat enterprise linux desktop 7.0; redhat enterprise linux hpc node 7.0; redhat enterprise linux server 7.0; redhat enterprise linux workstation 7.0receipt
Show all 9 published ranges
redhat enterprise linux desktop 7.0
redhat enterprise linux hpc node 7.0
redhat enterprise linux server 7.0
redhat enterprise linux workstation 7.0
canonical ubuntu linux 12.04
canonical ubuntu linux 14.04
canonical ubuntu linux 16.04
canonical ubuntu linux 16.10
nettle project nettle < 3.3

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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What it is stated by the CNA

The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channel attack. receipt

NVD's analysis a second authority

severity
7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
weakness
CWE-203
affected versions
redhat enterprise linux desktop 7.0; redhat enterprise linux hpc node 7.0; redhat enterprise linux server 7.0; and 6 more, listed in full below

check it yourself openwall.com ubuntu.com security.gentoo.org git.lysator.liu.se bugzilla.redhat.com eprint.iacr.org +2 morereceipt

Dated events

2025-03-29EPSS moved 0.03 to 0.202025-03-30EPSS moved 0.20 to 0.03

Movement the material steps

4 Feb 20220.01183
7 Mar 20230.00517 · scoring model v2023.03.01
17 Mar 20250.03417 · scoring model v2025.03.14
29 Mar 20250.19843 · crossed 0.10
30 Mar 20250.03417 · crossed 0.10
15 Jun 20260.05048 · scoring model v2026.06.15
27 Jun 20260.05007
Show all 22 observations
4 Feb 20220.01183
7 Mar 20230.00517
19 Jul 20230.00365
17 Dec 20240.00317
17 Mar 20250.03417
29 Mar 20250.19843
30 Mar 20250.03417
1 Jul 20250.02102
25 Sep 20250.0165
1 Oct 20250.01684
27 Oct 20250.0165
28 Oct 20250.01684
18 Dec 20250.01555
19 Dec 20250.01684
27 Dec 20250.0165
28 Dec 20250.01684
5 Apr 20260.03008
13 May 20260.03417
14 May 20260.02694
7 Jun 20260.03437
15 Jun 20260.05048
27 Jun 20260.05007

22 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.05007Published2017-04-14Index as of2026-06-27

The record had been public for 9 years, 2 months when this index was last written.

Published 2017-04-14 receipt · Index as of 2026-06-27 derived

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