Is CVE-2017-2647 in the CISA KEV catalog?

No. CVE-2017-2647 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-2647?

CVE-2017-2647 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2017-2647?

CVE-2017-2647 has an EPSS score of 0.41% (33th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-2647?

Upgrade linux on debian 11 to 4.0.2-1 or later. Fixes are available for 10 affected products.

CVE & CISA-KEV Catalog

CVE-2017-2647

HIGH

7.8

CVSS v3

NVD

Description

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.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

linuxDebian

Fixed in:4.0.2-1CVE-2017-2647

linuxUbuntu

Fixed in:3.13.0-164.214USN-3849-1

linux-image-3.13.0-164-genericUbuntu

Fixed in:3.13.0-164.214USN-3849-1

linux-image-3.13.0-164-generic-lpaeUbuntu

Fixed in:3.13.0-164.214USN-3849-1

linux-image-3.13.0-164-lowlatencyUbuntu

Fixed in:3.13.0-164.214USN-3849-1

linux-image-3.13.0-164-powerpc-e500Ubuntu

Fixed in:3.13.0-164.214USN-3849-1

linux-image-3.13.0-164-powerpc-e500mcUbuntu

Fixed in:3.13.0-164.214USN-3849-1

linux-image-3.13.0-164-powerpc-smpUbuntu

Fixed in:3.13.0-164.214USN-3849-1

linux-image-3.13.0-164-powerpc64-embUbuntu

Fixed in:3.13.0-164.214USN-3849-1

linux-image-3.13.0-164-powerpc64-smpUbuntu

Fixed in:3.13.0-164.214USN-3849-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.41%probability of exploitation in 30 days

33rdpercentile

Low risk: more likely to be exploited than 33% of all known CVEs.

References

Patch3

Third-Party Advisory1

securityfocus.com

Other references6

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.