CVE-2017-18017 in the critical feed json
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 atta…
published 2018-01-03 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-9157
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 52.8%
- EPSS 52.8% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- linux linux_kernel 3.2.99, 3.10.108, 3.16.54, 3.18.60, 4.1.43, 4.4.76, 4.9.36, 4.11
- linux Debian 14, Debian 13, Debian 12 4.11.6-1
debian advisories DEBIAN-CVE-2017-18017
- linux Ubuntu 14.04 LTS 3.13.0-142.191
- linux Ubuntu 16.04 LTS 4.4.0-89.112
- linux-aws Ubuntu 16.04 LTS 4.4.0-1028.37
- linux-gcp Ubuntu 16.04 LTS 4.13.0-1002.5
- linux-gke Ubuntu 16.04 LTS 4.4.0-1024.24
- linux-hwe Ubuntu 16.04 LTS 4.13.0-32.35~16.04.1
- linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1067.75
- linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-89.112~14.04.1
ubuntu advisories UBUNTU-CVE-2017-18017
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- kernel RHEL 7 3.10.0-862.el7
- perf RHEL 7 3.10.0-862.el7
- python-perf RHEL 7 3.10.0-862.el7
- kernel-kdump RHEL 7 3.10.0-862.el7
- kernel-tools RHEL 7 3.10.0-862.el7
- kernel-tools-libs RHEL 7 3.10.0-862.el7
- kernel-bootwrapper RHEL 7 3.10.0-862.el7
- kernel-abi-whitelists RHEL 7 3.10.0-862.el7
red hat advisories RHSA-2018:1737RHSA-2018:1062RHSA-2018:1319RHSA-2018:1170RHSA-2018:1130RHSA-2018:0676
- kernel-rt SLE Real Time 12 SP3 4.4.120-3.8.1
- kernel-syms-rt SLE Real Time 12 SP3 4.4.120-3.8.1
- kernel-rt_debug SLE Real Time 12 SP3 4.4.120-3.8.1
- kernel-source-rt SLE Real Time 12 SP3 4.4.120-3.8.1
- kernel-ec2 SLE Module for Public Cloud 12 3.12.74-60.64.85.1
- kernel-xen SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 3.12.74-60.64.85.1
- kernel-syms SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 3.12.74-60.64.85.1
- kernel-source SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 3.12.74-60.64.85.1
suse advisories SUSE-SU-2018:0986-1SUSE-SU-2018:0848-1SUSE-SU-2018:0841-1SUSE-SU-2018:0834-1SUSE-SU-2018:0660-1SUSE-SU-2018:0555-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2017-18017 updated cvss 6.5
kernel: netfilter: use-after-free in tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c
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Red Hat Enterprise Linux 5 kernelaffected: no fix planned “Will not fix”
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Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, kernel-abi-whitelists 3.10.0-862.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, kernel-abi-whitelists 3.10.0-862.el7, +1 morefixed: vendor fix RHSA-2018:1062
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Red Hat Enterprise Linux ComputeNode EUS (v. 7.3) perf 3.10.0-514.51.1.el7, kernel 3.10.0-514.51.1.el7, python-perf 3.10.0-514.51.1.el7, kernel-tools 3.10.0-514.51.1.el7, kernel-tools-libs 3.10.0-514.51.1.el7, kernel-abi-whitelists 3.10.0-514.51.1.el7, +1 morefixed: vendor fix RHSA-2018:1737
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Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) perf 3.10.0-693.25.2.el7, kernel 3.10.0-693.25.2.el7, python-perf 3.10.0-693.25.2.el7, kernel-tools 3.10.0-693.25.2.el7, kernel-tools-libs 3.10.0-693.25.2.el7, kernel-abi-whitelists 3.10.0-693.25.2.el7, +1 morefixed: vendor fix RHSA-2018:1130
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Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.el7fixed: vendor fix RHSA-2018:1062
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Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.51.1.el7fixed: vendor fix RHSA-2018:1737
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Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.25.2.el7fixed: vendor fix RHSA-2018:1130
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Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-696.28.1.el6, kernel 2.6.32-696.28.1.el6, kernel-firmware 2.6.32-696.28.1.el6, kernel-abi-whitelists 2.6.32-696.28.1.el6, kernel-debuginfo-common-i686 2.6.32-696.28.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.28.1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-696.28.1.el6, kernel-debuginfo-common-i686 2.6.32-696.28.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.28.1.el6fixed: vendor fix RHSA-2018:1319
show 15 moreshow fewer
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Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-862.rt56.804.el7, kernel-rt-trace 3.10.0-862.rt56.804.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-862.rt56.804.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-862.rt56.804.el7, kernel-rt-kvm 3.10.0-862.rt56.804.el7, kernel-rt-trace 3.10.0-862.rt56.804.el7, kernel-rt-debug-kvm 3.10.0-862.rt56.804.el7, kernel-rt-trace-kvm 3.10.0-862.rt56.804.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-862.rt56.804.el7fixed: vendor fix RHSA-2018:0676
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Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-696.28.1.el6, kernel 2.6.32-696.28.1.el6, kernel-firmware 2.6.32-696.28.1.el6, kernel-abi-whitelists 2.6.32-696.28.1.el6, kernel-debuginfo-common-i686 2.6.32-696.28.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.28.1.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-696.28.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.28.1.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-696.28.1.el6, kernel 2.6.32-696.28.1.el6, kernel-kdump 2.6.32-696.28.1.el6, kernel-firmware 2.6.32-696.28.1.el6, kernel-bootwrapper 2.6.32-696.28.1.el6, kernel-abi-whitelists 2.6.32-696.28.1.el6, +4 morefixed: vendor fix RHSA-2018:1319
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Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-kdump 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, +6 morefixed: vendor fix RHSA-2018:1062
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Red Hat Enterprise Linux Server EUS (v. 7.3) perf 3.10.0-514.51.1.el7, kernel 3.10.0-514.51.1.el7, python-perf 3.10.0-514.51.1.el7, kernel-kdump 3.10.0-514.51.1.el7, kernel-tools 3.10.0-514.51.1.el7, kernel-tools-libs 3.10.0-514.51.1.el7, +6 morefixed: vendor fix RHSA-2018:1737
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Red Hat Enterprise Linux Server EUS (v. 7.4) perf 3.10.0-693.25.2.el7, kernel 3.10.0-693.25.2.el7, python-perf 3.10.0-693.25.2.el7, kernel-kdump 3.10.0-693.25.2.el7, kernel-tools 3.10.0-693.25.2.el7, kernel-tools-libs 3.10.0-693.25.2.el7, +6 morefixed: vendor fix RHSA-2018:1130
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Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-696.28.1.el6, kernel-debuginfo-common-i686 2.6.32-696.28.1.el6, kernel-debuginfo-common-ppc64 2.6.32-696.28.1.el6, kernel-debuginfo-common-s390x 2.6.32-696.28.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.28.1.el6fixed: vendor fix RHSA-2018:1319
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Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-862.el7, kernel-debuginfo-common-x86_64 3.10.0-862.el7, kernel-debuginfo-common-ppc64le 3.10.0-862.el7fixed: vendor fix RHSA-2018:1062
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Red Hat Enterprise Linux Server Optional EUS (v. 7.3) kernel-debuginfo-common-ppc64 3.10.0-514.51.1.el7, kernel-debuginfo-common-x86_64 3.10.0-514.51.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-514.51.1.el7fixed: vendor fix RHSA-2018:1737
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Red Hat Enterprise Linux Server Optional EUS (v. 7.4) kernel-debuginfo-common-ppc64 3.10.0-693.25.2.el7, kernel-debuginfo-common-x86_64 3.10.0-693.25.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.25.2.el7fixed: vendor fix RHSA-2018:1130
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Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-696.28.1.el6, kernel 2.6.32-696.28.1.el6, kernel-firmware 2.6.32-696.28.1.el6, kernel-abi-whitelists 2.6.32-696.28.1.el6, kernel-debuginfo-common-i686 2.6.32-696.28.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.28.1.el6fixed: vendor fix RHSA-2018:1319
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Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, kernel-abi-whitelists 3.10.0-862.el7, +1 morefixed: vendor fix RHSA-2018:1062
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Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-696.28.1.el6, kernel-debuginfo-common-i686 2.6.32-696.28.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.28.1.el6fixed: vendor fix RHSA-2018:1319
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Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.el7fixed: vendor fix RHSA-2018:1062
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Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-693.25.2.rt56.612.el6rt, kernel-rt-trace 3.10.0-693.25.2.rt56.612.el6rt, kernel-rt-vanilla 3.10.0-693.25.2.rt56.612.el6rt, kernel-rt-firmware 3.10.0-693.25.2.rt56.612.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-693.25.2.rt56.612.el6rtfixed: vendor fix RHSA-2018:1170
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Red Hat Enterprise Linux 7 perf, kernel, kernel-alt, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-core, kernel-tools, python3-perf, +17 morenot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
52.84% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-416 Use After Free
- Technology feeds
References
-
github.com
/torvalds/linux/commit/2638fd0f92d4397884fd991d8f4925cb3f081901
patch, third-party-advisory
-
git.kernel.org
/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2638fd0f92d4397884fd991d8f4925cb3f081901
patch, third-party-advisory
-
patchwork.ozlabs.org
/patch/746618/
patch, third-party-advisory
-
debian.org
/security/2018/dsa-4187
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3583-2/
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2018:1737
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2018:1062
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2018:1319
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3583-1/
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2018:0676
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2018:1170
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2018:1130
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-03/msg00067.html
vendor-advisory, mailing-list, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-03/msg00072.html
vendor-advisory, mailing-list, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-02/msg00008.html
vendor-advisory, mailing-list, third-party-advisory
-
ubuntu.com
/usn/USN-3583-1
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-02/msg00047.html
vendor-advisory, mailing-list, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-02/msg00013.html
vendor-advisory, mailing-list, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-04/msg00014.html
vendor-advisory, mailing-list, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-02/msg00015.html
vendor-advisory, mailing-list, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-02/msg00038.html
vendor-advisory, mailing-list, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-03/msg00070.html
vendor-advisory, mailing-list, third-party-advisory
-
ubuntu.com
/usn/USN-3583-2
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2018-03/msg00030.html
vendor-advisory, mailing-list, third-party-advisory
-
kernel.org
/pub/linux/kernel/v4.x/ChangeLog-4.9.36
release-notes, vendor-advisory
-
lkml.org
/lkml/2017/4/2/13
third-party-advisory
-
help.ecostruxureit.com
/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
third-party-advisory
-
bugs.launchpad.net
/ubuntu/+source/linux/+bug/1739765
issue-tracking, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2018/05/msg00000.html
mailing-list, third-party-advisory
-
securityfocus.com
/bid/102367
vdb-entry, broken-link, third-party-advisory
-
support.f5.com
/csp/article/K18352029
third-party-advisory
-
arista.com
/en/support/advisories-notices/security-advisories/4577-security-advisory-34
mitigation, third-party-advisory
- security.netapp.com /advisory/ntap-20250103-0010/
Sources
- CVE List CVE-2017-18017
- NVD CVE-2017-18017
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.