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Fencer Intel
medium 5.5

CVE-2016-4470 json

The key_reject_and_link function in security/keys/key.c in the Linux kernel through 4.6.3 does not ensure that a certain data structure is…

published 2016-06-27 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-5457

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

The key_reject_and_link function in security/keys/key.c in the Linux kernel through 4.6.3 does not ensure that a certain data structure is initialized, which allows local users to cause a denial of service (system crash) via vectors involving a crafted keyctl request2 command.

Patch / fix

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

debian advisories DEBIAN-CVE-2016-4470

  • linux Ubuntu 14.04 LTS 3.13.0-93.140
  • linux Ubuntu 16.04 LTS 4.4.0-34.53
  • linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1019.25
  • linux-lts-vivid Ubuntu 14.04 LTS 3.19.0-66.74~14.04.1
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-34.53~14.04.1
  • linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1022.25

ubuntu advisories UBUNTU-CVE-2016-4470

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 3.10.0-327.28.2.el7
  • perf RHEL 7 3.10.0-327.28.2.el7
  • python-perf RHEL 7 3.10.0-327.28.2.el7
  • kernel-kdump RHEL 7 3.10.0-327.28.2.el7
  • kernel-tools RHEL 7 3.10.0-327.28.2.el7
  • kernel-tools-libs RHEL 7 3.10.0-327.28.2.el7
  • kernel-bootwrapper RHEL 7 3.10.0-327.28.2.el7
  • kernel-abi-whitelists RHEL 7 3.10.0-327.28.2.el7

red hat advisories RHSA-2016:1539RHSA-2016:1532RHSA-2016:1541RHSA-2016:2133RHSA-2016:2128RHSA-2016:2074

  • kernel-ec2 SLE Module for Public Cloud 12 3.12.61-52.66.1
  • kernel-ec2 SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.86.1
  • kernel-pae SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.86.1
  • kernel-xen SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.86.1
  • kernel-syms SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.86.1
  • kernel-trace SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.86.1
  • kernel-bigsmp SLES 11 SP3-LTSS, OpenStack Cloud 5, Manager Proxy 2.1 +1 more 3.0.101-0.47.86.1
  • kernel-source SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.86.1

suse advisories SUSE-SU-2017:0471-1SUSE-SU-2017:0333-1SUSE-SU-2016:2245-1SUSE-SU-2016:2105-1SUSE-SU-2016:2018-1SUSE-SU-2016:2002-1

  • 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-2016-4470 updated cvss 7.8

kernel: Uninitialized variable in request_key handling causes kernel crash in error handling path

  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-327.28.2.el7, kernel 3.10.0-327.28.2.el7, python-perf 3.10.0-327.28.2.el7, kernel-tools 3.10.0-327.28.2.el7, kernel-tools-libs 3.10.0-327.28.2.el7, kernel-abi-whitelists 3.10.0-327.28.2.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.28.2.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-327.28.2.el7, kernel 3.10.0-327.28.2.el7, python-perf 3.10.0-327.28.2.el7, kernel-tools 3.10.0-327.28.2.el7, kernel-tools-libs 3.10.0-327.28.2.el7, kernel-abi-whitelists 3.10.0-327.28.2.el7, +1 more
    fixed: vendor fix RHSA-2016:1539
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) perf 3.10.0-229.40.1.el7, kernel 3.10.0-229.40.1.el7, kernel-tools 3.10.0-229.40.1.el7, kernel-tools-libs 3.10.0-229.40.1.el7, kernel-abi-whitelists 3.10.0-229.40.1.el7, kernel-debuginfo-common-x86_64 3.10.0-229.40.1.el7
    fixed: vendor fix RHSA-2016:1657
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.28.2.el7
    fixed: vendor fix RHSA-2016:1539
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) python-perf 3.10.0-229.40.1.el7, kernel-debuginfo-common-x86_64 3.10.0-229.40.1.el7
    fixed: vendor fix RHSA-2016:1657
  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-642.6.1.el6, kernel 2.6.32-642.6.1.el6, kernel-firmware 2.6.32-642.6.1.el6, kernel-abi-whitelists 2.6.32-642.6.1.el6, kernel-debuginfo-common-i686 2.6.32-642.6.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.6.1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-642.6.1.el6, kernel-debuginfo-common-i686 2.6.32-642.6.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.6.1.el6
    fixed: vendor fix RHSA-2016:2006
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-327.28.2.rt56.234.el7_2, kernel-rt-kvm 3.10.0-327.28.2.rt56.234.el7_2, kernel-rt-trace 3.10.0-327.28.2.rt56.234.el7_2, kernel-rt-debug-kvm 3.10.0-327.28.2.rt56.234.el7_2, kernel-rt-trace-kvm 3.10.0-327.28.2.rt56.234.el7_2, kernel-rt-debuginfo-common-x86_64 3.10.0-327.28.2.rt56.234.el7_2
    fixed: vendor fix RHSA-2016:1541
  • Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-642.6.1.el6, kernel 2.6.32-642.6.1.el6, kernel-firmware 2.6.32-642.6.1.el6, kernel-abi-whitelists 2.6.32-642.6.1.el6, kernel-debuginfo-common-i686 2.6.32-642.6.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.6.1.el6
    fixed: vendor fix RHSA-2016:2006
  • Red Hat Enterprise Linux HPC Node EUS (v. 6.6) perf 2.6.32-504.54.1.el6, kernel 2.6.32-504.54.1.el6, kernel-firmware 2.6.32-504.54.1.el6, kernel-abi-whitelists 2.6.32-504.54.1.el6, kernel-debuginfo-common-i686 2.6.32-504.54.1.el6, kernel-debuginfo-common-x86_64 2.6.32-504.54.1.el6
    fixed: vendor fix RHSA-2016:2128
show 25 more
  • Red Hat Enterprise Linux HPC Node EUS (v. 6.7) perf 2.6.32-573.35.1.el6, kernel 2.6.32-573.35.1.el6, kernel-firmware 2.6.32-573.35.1.el6, kernel-abi-whitelists 2.6.32-573.35.1.el6, kernel-debuginfo-common-i686 2.6.32-573.35.1.el6, kernel-debuginfo-common-x86_64 2.6.32-573.35.1.el6
    fixed: vendor fix RHSA-2016:2076
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-642.6.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.6.1.el6
    fixed: vendor fix RHSA-2016:2006
  • Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6) python-perf 2.6.32-504.54.1.el6, kernel-debuginfo-common-x86_64 2.6.32-504.54.1.el6
    fixed: vendor fix RHSA-2016:2128
  • Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) python-perf 2.6.32-573.35.1.el6, kernel-debuginfo-common-x86_64 2.6.32-573.35.1.el6
    fixed: vendor fix RHSA-2016:2076
  • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-327.28.2.rt56.234.el7_2, kernel-rt-trace 3.10.0-327.28.2.rt56.234.el7_2, kernel-rt-debuginfo-common-x86_64 3.10.0-327.28.2.rt56.234.el7_2
    fixed: vendor fix RHSA-2016:1541
  • Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-642.6.1.el6, kernel 2.6.32-642.6.1.el6, kernel-kdump 2.6.32-642.6.1.el6, kernel-firmware 2.6.32-642.6.1.el6, kernel-bootwrapper 2.6.32-642.6.1.el6, kernel-abi-whitelists 2.6.32-642.6.1.el6, +4 more
    fixed: vendor fix RHSA-2016:2006
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-327.28.2.el7, kernel 3.10.0-327.28.2.el7, python-perf 3.10.0-327.28.2.el7, kernel-kdump 3.10.0-327.28.2.el7, kernel-tools 3.10.0-327.28.2.el7, kernel-tools-libs 3.10.0-327.28.2.el7, +6 more
    fixed: vendor fix RHSA-2016:1539
  • Red Hat Enterprise Linux Server AUS (v. 6.4) perf 2.6.32-358.75.1.el6, kernel 2.6.32-358.75.1.el6, kernel-firmware 2.6.32-358.75.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.75.1.el6
    fixed: vendor fix RHSA-2016:2133
  • Red Hat Enterprise Linux Server AUS (v. 6.5) perf 2.6.32-431.74.1.el6, kernel 2.6.32-431.74.1.el6, kernel-firmware 2.6.32-431.74.1.el6, kernel-abi-whitelists 2.6.32-431.74.1.el6, kernel-debuginfo-common-x86_64 2.6.32-431.74.1.el6
    fixed: vendor fix RHSA-2016:2074
  • Red Hat Enterprise Linux Server EUS (v. 6.6) perf 2.6.32-504.54.1.el6, kernel 2.6.32-504.54.1.el6, kernel-kdump 2.6.32-504.54.1.el6, kernel-firmware 2.6.32-504.54.1.el6, kernel-bootwrapper 2.6.32-504.54.1.el6, kernel-abi-whitelists 2.6.32-504.54.1.el6, +4 more
    fixed: vendor fix RHSA-2016:2128
  • Red Hat Enterprise Linux Server EUS (v. 6.7) perf 2.6.32-573.35.1.el6, kernel 2.6.32-573.35.1.el6, kernel-kdump 2.6.32-573.35.1.el6, kernel-firmware 2.6.32-573.35.1.el6, kernel-bootwrapper 2.6.32-573.35.1.el6, kernel-abi-whitelists 2.6.32-573.35.1.el6, +4 more
    fixed: vendor fix RHSA-2016:2076
  • Red Hat Enterprise Linux Server EUS (v. 7.1) perf 3.10.0-229.40.1.el7, kernel 3.10.0-229.40.1.el7, perf 3.10.0-229.40.1.ael7b, kernel 3.10.0-229.40.1.ael7b, kernel-kdump 3.10.0-229.40.1.el7, kernel-tools 3.10.0-229.40.1.el7, +11 more
    fixed: vendor fix RHSA-2016:1657
  • Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-642.6.1.el6, kernel-debuginfo-common-i686 2.6.32-642.6.1.el6, kernel-debuginfo-common-ppc64 2.6.32-642.6.1.el6, kernel-debuginfo-common-s390x 2.6.32-642.6.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.6.1.el6
    fixed: vendor fix RHSA-2016:2006
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-327.28.2.el7, kernel-debuginfo-common-x86_64 3.10.0-327.28.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-327.28.2.el7
    fixed: vendor fix RHSA-2016:1539
  • Red Hat Enterprise Linux Server Optional AUS (v. 6.4) kernel 2.6.32-358.75.1.el6, python-perf 2.6.32-358.75.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.75.1.el6
    fixed: vendor fix RHSA-2016:2133
  • Red Hat Enterprise Linux Server Optional AUS (v. 6.5) kernel 2.6.32-431.74.1.el6, python-perf 2.6.32-431.74.1.el6, kernel-debuginfo-common-x86_64 2.6.32-431.74.1.el6
    fixed: vendor fix RHSA-2016:2074
  • Red Hat Enterprise Linux Server Optional EUS (v. 6.6) python-perf 2.6.32-504.54.1.el6, kernel-debuginfo-common-i686 2.6.32-504.54.1.el6, kernel-debuginfo-common-ppc64 2.6.32-504.54.1.el6, kernel-debuginfo-common-s390x 2.6.32-504.54.1.el6, kernel-debuginfo-common-x86_64 2.6.32-504.54.1.el6
    fixed: vendor fix RHSA-2016:2128
  • Red Hat Enterprise Linux Server Optional EUS (v. 6.7) python-perf 2.6.32-573.35.1.el6, kernel-debuginfo-common-i686 2.6.32-573.35.1.el6, kernel-debuginfo-common-ppc64 2.6.32-573.35.1.el6, kernel-debuginfo-common-s390x 2.6.32-573.35.1.el6, kernel-debuginfo-common-x86_64 2.6.32-573.35.1.el6
    fixed: vendor fix RHSA-2016:2076
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.1) python-perf 3.10.0-229.40.1.el7, python-perf 3.10.0-229.40.1.ael7b, kernel-debuginfo-common-ppc64 3.10.0-229.40.1.el7, kernel-debuginfo-common-s390x 3.10.0-229.40.1.el7, kernel-debuginfo-common-x86_64 3.10.0-229.40.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-229.40.1.ael7b
    fixed: vendor fix RHSA-2016:1657
  • Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-642.6.1.el6, kernel 2.6.32-642.6.1.el6, kernel-firmware 2.6.32-642.6.1.el6, kernel-abi-whitelists 2.6.32-642.6.1.el6, kernel-debuginfo-common-i686 2.6.32-642.6.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.6.1.el6
    fixed: vendor fix RHSA-2016:2006
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-327.28.2.el7, kernel 3.10.0-327.28.2.el7, python-perf 3.10.0-327.28.2.el7, kernel-tools 3.10.0-327.28.2.el7, kernel-tools-libs 3.10.0-327.28.2.el7, kernel-abi-whitelists 3.10.0-327.28.2.el7, +1 more
    fixed: vendor fix RHSA-2016:1539
  • Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-642.6.1.el6, kernel-debuginfo-common-i686 2.6.32-642.6.1.el6, kernel-debuginfo-common-x86_64 2.6.32-642.6.1.el6
    fixed: vendor fix RHSA-2016:2006
  • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.28.2.el7
    fixed: vendor fix RHSA-2016:1539
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-327.rt56.194.el6rt, kernel-rt-trace 3.10.0-327.rt56.194.el6rt, kernel-rt-vanilla 3.10.0-327.rt56.194.el6rt, kernel-rt-firmware 3.10.0-327.rt56.194.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-327.rt56.194.el6rt
    fixed: vendor fix RHSA-2016:1532
  • 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

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

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.