Is CVE-2017-18017 being actively exploited?

CVE-2017-18017 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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

CVE-2017-18017 has a CVSS 3.1 base score of 9.8 (CRITICAL).

CVE-2017-18017

CRITICAL · CVSS 9.8EPSS 52.8%EU EUVD

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.

Key facts

CVSS score: 9.8 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
EPSS score: 52.8% (99th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2017-9157)
Published: January 3, 2018
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2017-9157 in the EU Vulnerability Database. Last updated in EUVD on January 3, 2025.

View on the EU Vulnerability Database

Affected products

arista / eos
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
debian / debian linux
f5 / arx
linux / linux kernel
openstack / cloud magnum orchestration
opensuse / leap
redhat / enterprise linux desktop
redhat / enterprise linux desktop
redhat / enterprise linux eus
redhat / enterprise linux eus
redhat / enterprise linux eus
redhat / enterprise linux eus
redhat / enterprise linux for real time
redhat / enterprise linux for real time for nfv
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux server aus
redhat / enterprise linux server aus
redhat / enterprise linux server aus
redhat / enterprise linux server aus
redhat / enterprise linux server tus
redhat / enterprise linux server tus
redhat / enterprise linux server tus
redhat / enterprise linux server tus
redhat / enterprise linux workstation
redhat / enterprise linux workstation
redhat / mrg realtime
suse / caas platform
suse / linux enterprise debuginfo
suse / linux enterprise debuginfo
suse / linux enterprise desktop
suse / linux enterprise desktop
suse / linux enterprise high availability
suse / linux enterprise high availability
suse / linux enterprise high availability extension
suse / linux enterprise live patching
suse / linux enterprise live patching
suse / linux enterprise module for public cloud
suse / linux enterprise point of sale
suse / linux enterprise real time extension
suse / linux enterprise real time extension
suse / linux enterprise real time extension
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise server

and 9 more…

Certified products that may be affected

4 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 7.6 - Red Hat, Inc. - Common Criteria CCEVS-VR-VID-11039-2020 - archived
SUSE Linux Enterprise Server 12 SP2 - NSS Cryptographic Module - SUSE, LLC - FIPS 140 3216 - historical
SUSE Linux Enterprise Server 11 Service Pack 2 on IBM System z - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0852-2013 - archived
SUSE Linux Enterprise Server 11 Service Pack 2 including KVM virtualization - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0787-2013 - archived

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2638fd0f92d4397884fd991d8f4925cb3f081901(Patch, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00008.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00013.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00015.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00038.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00047.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00030.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00067.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00070.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00072.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2018-04/msg00014.html(Mailing List, Third Party Advisory)
http://patchwork.ozlabs.org/patch/746618/(Patch, Third Party Advisory)
http://www.securityfocus.com/bid/102367(Broken Link, Third Party Advisory, VDB Entry)
http://www.ubuntu.com/usn/USN-3583-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-3583-2(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:0676(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:1062(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:1130(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:1170(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:1319(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:1737(Third Party Advisory)
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1739765(Issue Tracking, Third Party Advisory)
https://github.com/torvalds/linux/commit/2638fd0f92d4397884fd991d8f4925cb3f081901(Patch, Third Party Advisory)
https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0(Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html(Mailing List, Third Party Advisory)
https://lkml.org/lkml/2017/4/2/13(Third Party Advisory)
https://security.netapp.com/advisory/ntap-20250103-0010/
https://support.f5.com/csp/article/K18352029(Third Party Advisory)
https://usn.ubuntu.com/3583-1/(Third Party Advisory)
https://usn.ubuntu.com/3583-2/(Third Party Advisory)
https://www.arista.com/en/support/advisories-notices/security-advisories/4577-security-advisory-34(Mitigation, Third Party Advisory)
https://www.debian.org/security/2018/dsa-4187(Third Party Advisory)
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.36(Release Notes, Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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