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Fencer Intel
high 7.5

CVE-2016-8666 json

The IP stack in the Linux kernel before 4.6 allows remote attackers to cause a denial of service (stack consumption and panic) or possibly…

published 2016-10-16 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-9505

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.7%
EPSS 4.7% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

The IP stack in the Linux kernel before 4.6 allows remote attackers to cause a denial of service (stack consumption and panic) or possibly have unspecified other impact by triggering use of the GRO path for packets with tunnel stacking, as demonstrated by interleaved IPv4 headers and GRE headers, a related issue to CVE-2016-7039.

Patch / fix

  • linux linux_kernel 3.16.35, 3.18.47, 4.1.38, 4.4.29, 4.6
  • linux Debian 14, Debian 13, Debian 12 4.6.1-1

debian advisories DEBIAN-CVE-2016-8666

  • linux Ubuntu 14.04 LTS 3.13.0-98.145
  • linux Ubuntu 16.04 LTS 4.4.0-42.62
  • linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1027.33
  • linux-lts-vivid Ubuntu 14.04 LTS 3.19.0-71.79~14.04.1
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-42.62~14.04.1
  • linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1030.33

ubuntu advisories UBUNTU-CVE-2016-8666

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-aarch64 RHEL 7 4.5.0-15.2.1.el7
  • perf RHEL 7 4.5.0-15.2.1.el7
  • kernel RHEL 7 4.5.0-15.2.1.el7
  • python-perf RHEL 7 4.5.0-15.2.1.el7
  • kernel-tools RHEL 7 4.5.0-15.2.1.el7
  • kernel-tools-libs RHEL 7 4.5.0-15.2.1.el7
  • kernel-debuginfo-common-aarch64 RHEL 7 4.5.0-15.2.1.el7
  • kernel RHEL 7 3.10.0-327.36.2.el7

red hat advisories RHSA-2017:0372RHSA-2016:2047RHSA-2017:0004RHSA-2016:2107RHSA-2016:2110

  • kernel-syms SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 4.4.38-93.1
  • kernel-source SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 4.4.38-93.1
  • kernel-default SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +3 more 4.4.38-93.1
  • kernel-obs-build SLE Software Development Kit 12 SP2 4.4.38-93.1
  • kernel-ec2 SLE Module for Public Cloud 12 3.12.67-60.64.18.1
  • kernel-xen SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.67-60.64.18.1
  • kernel-syms SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.67-60.64.18.1
  • kernel-source SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.67-60.64.18.1

suse advisories SUSE-SU-2017:0181-1SUSE-SU-2016:2912-1SUSE-SU-2016:2673-1SUSE-SU-2016:2674-1SUSE-SU-2016:2637-1SUSE-SU-2016:2638-1

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-2016-8666 updated cvss 7.5

kernel: Remotely triggerable recursion in GRE code leading to kernel crash

  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-327.36.2.el7, kernel 3.10.0-327.36.2.el7, python-perf 3.10.0-327.36.2.el7, kernel-tools 3.10.0-327.36.2.el7, kernel-tools-libs 3.10.0-327.36.2.el7, kernel-abi-whitelists 3.10.0-327.36.2.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.36.2.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-327.36.2.el7, kernel 3.10.0-327.36.2.el7, python-perf 3.10.0-327.36.2.el7, kernel-tools 3.10.0-327.36.2.el7, kernel-tools-libs 3.10.0-327.36.2.el7, kernel-abi-whitelists 3.10.0-327.36.2.el7, +1 more
    fixed: vendor fix RHSA-2016:2047
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) perf 3.10.0-229.46.1.el7, kernel 3.10.0-229.46.1.el7, kernel-tools 3.10.0-229.46.1.el7, kernel-tools-libs 3.10.0-229.46.1.el7, kernel-abi-whitelists 3.10.0-229.46.1.el7, kernel-debuginfo-common-x86_64 3.10.0-229.46.1.el7
    fixed: vendor fix RHSA-2017:0004
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.36.2.el7
    fixed: vendor fix RHSA-2016:2047
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) python-perf 3.10.0-229.46.1.el7, kernel-debuginfo-common-x86_64 3.10.0-229.46.1.el7
    fixed: vendor fix RHSA-2017:0004
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-327.36.3.rt56.238.el7, kernel-rt-kvm 3.10.0-327.36.3.rt56.238.el7, kernel-rt-trace 3.10.0-327.36.3.rt56.238.el7, kernel-rt-debug-kvm 3.10.0-327.36.3.rt56.238.el7, kernel-rt-trace-kvm 3.10.0-327.36.3.rt56.238.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-327.36.3.rt56.238.el7 Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-327.36.3.rt56.238.el7, kernel-rt-trace 3.10.0-327.36.3.rt56.238.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-327.36.3.rt56.238.el7
    fixed: vendor fix RHSA-2016:2110
  • Red Hat Enterprise Linux Server (v. 7) perf 4.5.0-15.2.1.el7, kernel 4.5.0-15.2.1.el7, perf 3.10.0-327.36.2.el7, kernel 3.10.0-327.36.2.el7, python-perf 4.5.0-15.2.1.el7, kernel-tools 4.5.0-15.2.1.el7, +13 more
    fixed: vendor fix RHSA-2016:2047
  • Red Hat Enterprise Linux Server EUS (v. 7.1) perf 3.10.0-229.46.1.el7, kernel 3.10.0-229.46.1.el7, perf 3.10.0-229.46.1.ael7b, kernel 3.10.0-229.46.1.ael7b, kernel-kdump 3.10.0-229.46.1.el7, kernel-tools 3.10.0-229.46.1.el7, +11 more
    fixed: vendor fix RHSA-2017:0004
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-aarch64 4.5.0-15.2.1.el7, kernel-debuginfo-common-ppc64 3.10.0-327.36.2.el7, kernel-debuginfo-common-x86_64 3.10.0-327.36.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-327.36.2.el7
    fixed: vendor fix RHSA-2016:2047
show 4 more
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.1) python-perf 3.10.0-229.46.1.el7, python-perf 3.10.0-229.46.1.ael7b, kernel-debuginfo-common-ppc64 3.10.0-229.46.1.el7, kernel-debuginfo-common-s390x 3.10.0-229.46.1.el7, kernel-debuginfo-common-x86_64 3.10.0-229.46.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-229.46.1.ael7b
    fixed: vendor fix RHSA-2017:0004
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-327.36.2.el7, kernel 3.10.0-327.36.2.el7, python-perf 3.10.0-327.36.2.el7, kernel-tools 3.10.0-327.36.2.el7, kernel-tools-libs 3.10.0-327.36.2.el7, kernel-abi-whitelists 3.10.0-327.36.2.el7, +1 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.36.2.el7
    fixed: vendor fix RHSA-2016:2047
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-327.rt56.198.el6rt, kernel-rt-trace 3.10.0-327.rt56.198.el6rt, kernel-rt-vanilla 3.10.0-327.rt56.198.el6rt, kernel-rt-firmware 3.10.0-327.rt56.198.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-327.rt56.198.el6rt
    fixed: vendor fix RHSA-2016:2107
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    not 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

4.70% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
Technology feeds

References

Sources

Fencer Intel 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.