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Fencer Intel
high 7.1

CVE-2016-4998 json

The IPT_SO_SET_REPLACE setsockopt implementation in the netfilter subsystem in the Linux kernel before 4.6 allows local users to cause a de…

published 2016-07-03 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-5963

cvss
7.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
1
Metasploit

Summary

The IPT_SO_SET_REPLACE setsockopt implementation in the netfilter subsystem in the Linux kernel before 4.6 allows local users to cause a denial of service (out-of-bounds read) or possibly obtain sensitive information from kernel heap memory by leveraging in-container root access to provide a crafted offset value that leads to crossing a ruleset blob boundary.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.6.2-2

debian advisories DEBIAN-CVE-2016-4998

  • linux Ubuntu 14.04 LTS 3.13.0-91.138
  • linux Ubuntu 16.04 LTS 4.4.0-28.47
  • linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1016.22
  • linux-lts-wily Ubuntu 14.04 LTS 4.2.0-41.48~14.04.1
  • linux-lts-vivid Ubuntu 14.04 LTS 3.19.0-64.72~14.04.1
  • linux-lts-utopic Ubuntu 14.04 LTS 3.16.0-76.98~14.04.1
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-28.47~14.04.1
  • linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1019.22

ubuntu advisories UBUNTU-CVE-2016-4998

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 6 2.6.32-642.13.1.el6
  • perf RHEL 6 2.6.32-642.13.1.el6
  • python-perf RHEL 6 2.6.32-642.13.1.el6
  • kernel-kdump RHEL 6 2.6.32-642.13.1.el6
  • kernel-firmware RHEL 6 2.6.32-642.13.1.el6
  • kernel-bootwrapper RHEL 6 2.6.32-642.13.1.el6
  • kernel-abi-whitelists RHEL 6 2.6.32-642.13.1.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-642.13.1.el6

red hat advisories RHSA-2017:0036RHSA-2016:1875RHSA-2016:1883RHSA-2016:1847

  • kernel-source openSUSE Tumbleweed 4.8.13-1.1

opensuse advisories openSUSE-SU-2024:10128-1

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-2016-4998 updated cvss 6.1

kernel: out of bounds reads when processing IPT_SO_SET_REPLACE setsockopt

  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-327.36.1.el7, kernel 3.10.0-327.36.1.el7, python-perf 3.10.0-327.36.1.el7, kernel-tools 3.10.0-327.36.1.el7, kernel-tools-libs 3.10.0-327.36.1.el7, kernel-abi-whitelists 3.10.0-327.36.1.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.36.1.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-327.36.1.el7, kernel 3.10.0-327.36.1.el7, python-perf 3.10.0-327.36.1.el7, kernel-tools 3.10.0-327.36.1.el7, kernel-tools-libs 3.10.0-327.36.1.el7, kernel-abi-whitelists 3.10.0-327.36.1.el7, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.36.1.el7
    fixed: vendor fix RHSA-2016:1847
  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-642.13.1.el6, kernel 2.6.32-642.13.1.el6, kernel-firmware 2.6.32-642.13.1.el6, kernel-abi-whitelists 2.6.32-642.13.1.el6, kernel-debuginfo-common-i686 2.6.32-642.13.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.13.1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-642.13.1.el6, kernel-debuginfo-common-i686 2.6.32-642.13.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.13.1.el6
    fixed: vendor fix RHSA-2017:0036
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-327.36.1.rt56.237.el7, kernel-rt-kvm 3.10.0-327.36.1.rt56.237.el7, kernel-rt-trace 3.10.0-327.36.1.rt56.237.el7, kernel-rt-debug-kvm 3.10.0-327.36.1.rt56.237.el7, kernel-rt-trace-kvm 3.10.0-327.36.1.rt56.237.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-327.36.1.rt56.237.el7
    fixed: vendor fix RHSA-2016:1875
  • Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-642.13.1.el6, kernel 2.6.32-642.13.1.el6, kernel-firmware 2.6.32-642.13.1.el6, kernel-abi-whitelists 2.6.32-642.13.1.el6, kernel-debuginfo-common-i686 2.6.32-642.13.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.13.1.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-642.13.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.13.1.el6
    fixed: vendor fix RHSA-2017:0036
  • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-327.36.1.rt56.237.el7, kernel-rt-trace 3.10.0-327.36.1.rt56.237.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-327.36.1.rt56.237.el7
    fixed: vendor fix RHSA-2016:1875
  • Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-642.13.1.el6, kernel 2.6.32-642.13.1.el6, kernel-kdump 2.6.32-642.13.1.el6, kernel-firmware 2.6.32-642.13.1.el6, kernel-bootwrapper 2.6.32-642.13.1.el6, kernel-abi-whitelists 2.6.32-642.13.1.el6, +4 more
    fixed: vendor fix RHSA-2017:0036
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-327.36.1.el7, kernel 3.10.0-327.36.1.el7, python-perf 3.10.0-327.36.1.el7, kernel-kdump 3.10.0-327.36.1.el7, kernel-tools 3.10.0-327.36.1.el7, kernel-tools-libs 3.10.0-327.36.1.el7, +6 more
    fixed: vendor fix RHSA-2016:1847
  • Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-642.13.1.el6, kernel-debuginfo-common-i686 2.6.32-642.13.1.el6, kernel-debuginfo-common-ppc64 2.6.32-642.13.1.el6, kernel-debuginfo-common-s390x 2.6.32-642.13.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.13.1.el6
    fixed: vendor fix RHSA-2017:0036
show 7 more
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-327.36.1.el7, kernel-debuginfo-common-x86_64 3.10.0-327.36.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-327.36.1.el7
    fixed: vendor fix RHSA-2016:1847
  • Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-642.13.1.el6, kernel 2.6.32-642.13.1.el6, kernel-firmware 2.6.32-642.13.1.el6, kernel-abi-whitelists 2.6.32-642.13.1.el6, kernel-debuginfo-common-i686 2.6.32-642.13.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.13.1.el6
    fixed: vendor fix RHSA-2017:0036
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-327.36.1.el7, kernel 3.10.0-327.36.1.el7, python-perf 3.10.0-327.36.1.el7, kernel-tools 3.10.0-327.36.1.el7, kernel-tools-libs 3.10.0-327.36.1.el7, kernel-abi-whitelists 3.10.0-327.36.1.el7, +1 more
    fixed: vendor fix RHSA-2016:1847
  • Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-642.13.1.el6, kernel-debuginfo-common-i686 2.6.32-642.13.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.13.1.el6
    fixed: vendor fix RHSA-2017:0036
  • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.36.1.el7
    fixed: vendor fix RHSA-2016:1847
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-327.rt56.197.el6rt, kernel-rt-trace 3.10.0-327.rt56.197.el6rt, kernel-rt-vanilla 3.10.0-327.rt56.197.el6rt, kernel-rt-firmware 3.10.0-327.rt56.197.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-327.rt56.197.el6rt
    fixed: vendor fix RHSA-2016:1883
  • Red Hat Enterprise Linux 5 kernel
    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

Timeline

  1. First public exploit (Metasploit exploit/linux/local/netfilter_priv_esc_ipv4)
  2. Published

Exploit prediction

1.88% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 3.0 7.1 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD 2.0 5.6 AV:L/AC:L/Au:N/C:P/I:N/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
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.