What is CVE-2017-18017?

CVE-2017-18017 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2017-18017 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

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

CVE-2017-18017 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2017-18017?

No patch is currently available for CVE-2017-18017. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2017-18017 actively exploited?

CVE-2017-18017 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2017-18017

Critical

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.

Package Linux Kernel

Published 2018-01-03

Last modified 2025-01-03

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2017-18017 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2017-18017 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Lists
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00008.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00013.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00015.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00038.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00047.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00030.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00067.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00070.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2018-03/msg00072.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2018-04/msg00014.html

Mailing List Third Party Advisory
Securityfocus
http://www.securityfocus.com/bid/102367

Broken Link Third Party Advisory VDB Entry
Ubuntu Security
http://www.ubuntu.com/usn/USN-3583-1

Third Party Advisory
Ubuntu Security
http://www.ubuntu.com/usn/USN-3583-2

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2018:0676

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2018:1062

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2018:1130

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2018:1170

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2018:1319

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2018:1737

Third Party Advisory
Bugs
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1739765

Issue Tracking Third Party Advisory
Help
https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0

Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html

Mailing List Third Party Advisory
Lkml
https://lkml.org/lkml/2017/4/2/13

Third Party Advisory
Support
https://support.f5.com/csp/article/K18352029

Third Party Advisory
Ubuntu Security
https://usn.ubuntu.com/3583-1/

Third Party Advisory
Ubuntu Security
https://usn.ubuntu.com/3583-2/

Third Party Advisory
Arista
https://www.arista.com/en/support/advisories-notices/security-advisories/4577-security-advisory-34

Mitigation Third Party Advisory
Debian Security
https://www.debian.org/security/2018/dsa-4187

Third Party Advisory
Kernel.org
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.36

Release Notes Vendor Advisory
Security
https://security.netapp.com/advisory/ntap-20250103-0010/
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2638fd0f92d4397884fd991d8f4925cb3f081901
Patch
Kernel patch commit
http://patchwork.ozlabs.org/patch/746618/
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/2638fd0f92d4397884fd991d8f4925cb3f081901
Patch

Details

CVE ID CVE-2017-18017

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2018-01-03

Modified 2025-01-03

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2017-18017?

CVE-2017-18017 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2017-18017 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2017-18017?

CVE-2017-18017 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2017-18017?

No patch is currently available for CVE-2017-18017. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2017-18017 actively exploited?

No — CVE-2017-18017 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →