CVE-2017-2647

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

The KEYS subsystem in the Linux kernel before 3.18 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via vectors involving a NULL value for a certain match field, related to the keyring_search_iterator function in keyring.c.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

March 31, 2017

Last Modified

June 17, 2026

References (20)

Vendor Advisories for CVE-2017-2647(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-extra-3.13.0-164-generic (3.13.0-164.214) @ trusty2026-05-22ubuntu
ubuntulinux-image-generic-lts-trusty (3.13.0.164.154) @ precise2026-05-22ubuntu
redhatkernel-0:2.6.32-504.84.1.el62020-09-24redhat
redhatkernel-0:2.6.32-754.33.1.el62020-08-25redhat
redhatkernel-0:3.10.0-514.28.1.el72017-08-08redhat
redhatkernel-rt-1:3.10.0-514.rt56.231.el6rt2017-08-08redhat
redhatkernel-rt-0:3.10.0-693.rt56.617.el72017-08-01redhat
redhatkernel-0:3.10.0-693.el72017-08-01redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux—4.0.2-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—4.0.2-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—4.0.2-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—4.0.2-1—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
linux3.2.41-2 ... 3.2.86-1 (64 versions)3.2.88-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(6)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 126 total refreshes for this CVE.

  1. 2026-08-20 22:51 UTCEPSS rescore
  2. 2026-08-19 16:59 UTCEPSS rescore
  3. 2026-08-18 13:43 UTCEPSS rescore
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  8. 2026-08-14 03:59 UTCOSV refresh
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  23. 2026-07-23 01:29 UTCEG score recompute
  24. 2026-07-22 22:08 UTCEG score recompute
  25. 2026-07-22 14:04 UTCEPSS rescore
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  40. 2026-06-23 21:30 UTCEPSS rescore
  41. 2026-06-23 08:00 UTCOSV refresh
  42. 2026-06-22 14:23 UTCEPSS rescore
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  44. 2026-06-21 14:54 UTCEPSS rescore
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  74. 2026-05-31 22:28 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2017-2647?
CVE-2017-2647 is a high vulnerability published on March 31, 2017. The KEYS subsystem in the Linux kernel before 3.18 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via vectors involving a NULL value for a certain match field, related to the keyringsearchiterator function in keyring.c.
When was CVE-2017-2647 disclosed?
CVE-2017-2647 was first published in the National Vulnerability Database on March 31, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-2647 actively exploited?
CVE-2017-2647 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.8% of all scored CVEs.
What is the CVSS score of CVE-2017-2647?
CVE-2017-2647 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2017-2647?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-2647, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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