Is CVE-2017-18221 in the CISA KEV catalog?

No. CVE-2017-18221 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-18221?

CVE-2017-18221 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2017-18221?

CVE-2017-18221 has an EPSS score of 0.50% (39th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-18221?

Upgrade linux on debian 11 to 4.11.6-1 or later. Fixes are available for 10 affected products.

CVE & CISA-KEV Catalog

CVE-2017-18221

MEDIUM

5.5

CVSS v3

NVD

Description

The __munlock_pagevec function in mm/mlock.c in the Linux kernel before 4.11.4 allows local users to cause a denial of service (NR_MLOCK accounting corruption) via crafted use of mlockall and munlockall system calls.

CWE-20Improper Input Validation

How to fix

Remediation Available

linuxDebian

Fixed in:4.11.6-1CVE-2017-18221

linuxUbuntu

Fixed in:3.13.0-149.199USN-3655-1

linux-image-3.13.0-149-genericUbuntu

Fixed in:3.13.0-149.199USN-3655-1

linux-image-3.13.0-149-generic-lpaeUbuntu

Fixed in:3.13.0-149.199USN-3655-1

linux-image-3.13.0-149-lowlatencyUbuntu

Fixed in:3.13.0-149.199USN-3655-1

linux-image-3.13.0-149-powerpc-e500Ubuntu

Fixed in:3.13.0-149.199USN-3655-1

linux-image-3.13.0-149-powerpc-e500mcUbuntu

Fixed in:3.13.0-149.199USN-3655-1

linux-image-3.13.0-149-powerpc-smpUbuntu

Fixed in:3.13.0-149.199USN-3655-1

linux-image-3.13.0-149-powerpc64-embUbuntu

Fixed in:3.13.0-149.199USN-3655-1

linux-image-3.13.0-149-powerpc64-smpUbuntu

Fixed in:3.13.0-149.199USN-3655-1

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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.50%probability of exploitation in 30 days

39thpercentile

Low risk: more likely to be exploited than 39% of all known CVEs.

References

Patch2

Vendor Advisory1

kernel.org

Third-Party Advisory1

securityfocus.com

Other references2

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	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 2024-11-21.