Is CVE-2017-18017 in the CISA KEV catalog?

No. CVE-2017-18017 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-18017?

CVE-2017-18017 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2017-18017?

CVE-2017-18017 has an EPSS score of 52.84% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-18017?

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

CVE & CISA-KEV Catalog

CVE-2017-18017

CRITICALEPSS 99th pctl

9.8

CVSS v3

NVD

Description

The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.

CWE-416Use After Free

How to fix

Remediation Available

linuxDebian

Fixed in:4.11.6-1CVE-2017-18017

linuxUbuntu

Fixed in:3.13.0-142.191USN-3583-1

linux-image-3.13.0-142-genericUbuntu

Fixed in:3.13.0-142.191USN-3583-1

linux-image-3.13.0-142-generic-lpaeUbuntu

Fixed in:3.13.0-142.191USN-3583-1

linux-image-3.13.0-142-lowlatencyUbuntu

Fixed in:3.13.0-142.191USN-3583-1

linux-image-3.13.0-142-powerpc-e500Ubuntu

Fixed in:3.13.0-142.191USN-3583-1

linux-image-3.13.0-142-powerpc-e500mcUbuntu

Fixed in:3.13.0-142.191USN-3583-1

linux-image-3.13.0-142-powerpc-smpUbuntu

Fixed in:3.13.0-142.191USN-3583-1

linux-image-3.13.0-142-powerpc64-embUbuntu

Fixed in:3.13.0-142.191USN-3583-1

linux-image-3.13.0-142-powerpc64-smpUbuntu

Fixed in:3.13.0-142.191USN-3583-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

52.84%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	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 2025-01-03.