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Fencer Vulns
high 7.5

CVE-2017-6214 json

The tcp_splice_read function in net/ipv4/tcp.c in the Linux kernel before 4.9.11 allows remote attackers to cause a denial of service (infi…

published 2017-02-23 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-15278

cvss
7.5
version 3.0, 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 tcp_splice_read function in net/ipv4/tcp.c in the Linux kernel before 4.9.11 allows remote attackers to cause a denial of service (infinite loop and soft lockup) via vectors involving a TCP packet with the URG flag.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.9.13-1

debian advisories DEBIAN-CVE-2017-6214

  • linux Ubuntu 14.04 LTS 3.13.0-132.181
  • linux Ubuntu 16.04 LTS 4.4.0-75.96
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1016.25
  • linux-gke Ubuntu 16.04 LTS 4.4.0-1012.12
  • linux-hwe Ubuntu 16.04 LTS 4.10.0-32.36~16.04.1
  • linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1054.61
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-75.96~14.04.1
  • linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1057.61

ubuntu advisories UBUNTU-CVE-2017-6214

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-rt enterprise mrg 2 1:3.10.0-514.rt56.228.el6rt
  • kernel-rt-trace enterprise mrg 2 1:3.10.0-514.rt56.228.el6rt
  • kernel-rt-vanilla enterprise mrg 2 1:3.10.0-514.rt56.228.el6rt
  • kernel-rt-firmware enterprise mrg 2 1:3.10.0-514.rt56.228.el6rt
  • kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 1:3.10.0-514.rt56.228.el6rt
  • kernel-rt RHEL 7 EXTRAS_RT 3.10.0-514.26.1.rt56.442.el7
  • kernel-rt-kvm RHEL 7 EXTRAS_RT 3.10.0-514.26.1.rt56.442.el7
  • kernel-rt-trace RHEL 7 EXTRAS_RT 3.10.0-514.26.1.rt56.442.el7

red hat advisories RHSA-2017:1647RHSA-2017:1616RHSA-2017:1615RHSA-2017:1372

  • kernel-ec2 SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.5.1
  • kernel-pae SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.5.1
  • kernel-xen SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.5.1
  • kernel-syms SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.5.1
  • kernel-trace SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.5.1
  • kernel-source SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.5.1
  • kernel-default SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.5.1
  • kernel-rt SLE Real Time 11 SP4 3.0.101.rt130-69.5.1

suse advisories SUSE-SU-2017:2525-1SUSE-SU-2017:2342-1SUSE-SU-2017:1990-1SUSE-SU-2017:1360-1SUSE-SU-2017:1301-1SUSE-SU-2017:1247-1

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-2017-6214 updated cvss 6.5

kernel: ipv4/tcp: Infinite loop in tcp_splice_read()

  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-514.26.1.el7, kernel 3.10.0-514.26.1.el7, python-perf 3.10.0-514.26.1.el7, kernel-tools 3.10.0-514.26.1.el7, kernel-tools-libs 3.10.0-514.26.1.el7, kernel-abi-whitelists 3.10.0-514.26.1.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-514.26.1.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-514.26.1.el7, kernel 3.10.0-514.26.1.el7, python-perf 3.10.0-514.26.1.el7, kernel-tools 3.10.0-514.26.1.el7, kernel-tools-libs 3.10.0-514.26.1.el7, kernel-abi-whitelists 3.10.0-514.26.1.el7, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-514.26.1.el7
    fixed: vendor fix RHSA-2017:1615
  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-696.3.1.el6, kernel 2.6.32-696.3.1.el6, kernel-firmware 2.6.32-696.3.1.el6, kernel-abi-whitelists 2.6.32-696.3.1.el6, kernel-debuginfo-common-i686 2.6.32-696.3.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.3.1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-696.3.1.el6, kernel-debuginfo-common-i686 2.6.32-696.3.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.3.1.el6
    fixed: vendor fix RHSA-2017:1372
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-514.26.1.rt56.442.el7, kernel-rt-kvm 3.10.0-514.26.1.rt56.442.el7, kernel-rt-trace 3.10.0-514.26.1.rt56.442.el7, kernel-rt-debug-kvm 3.10.0-514.26.1.rt56.442.el7, kernel-rt-trace-kvm 3.10.0-514.26.1.rt56.442.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-514.26.1.rt56.442.el7
    fixed: vendor fix RHSA-2017:1616
  • Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-696.3.1.el6, kernel 2.6.32-696.3.1.el6, kernel-firmware 2.6.32-696.3.1.el6, kernel-abi-whitelists 2.6.32-696.3.1.el6, kernel-debuginfo-common-i686 2.6.32-696.3.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.3.1.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-696.3.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.3.1.el6
    fixed: vendor fix RHSA-2017:1372
  • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-514.26.1.rt56.442.el7, kernel-rt-trace 3.10.0-514.26.1.rt56.442.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-514.26.1.rt56.442.el7
    fixed: vendor fix RHSA-2017:1616
  • Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-696.3.1.el6, kernel 2.6.32-696.3.1.el6, kernel-kdump 2.6.32-696.3.1.el6, kernel-firmware 2.6.32-696.3.1.el6, kernel-bootwrapper 2.6.32-696.3.1.el6, kernel-abi-whitelists 2.6.32-696.3.1.el6, +4 more
    fixed: vendor fix RHSA-2017:1372
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-514.26.1.el7, kernel 3.10.0-514.26.1.el7, python-perf 3.10.0-514.26.1.el7, kernel-kdump 3.10.0-514.26.1.el7, kernel-tools 3.10.0-514.26.1.el7, kernel-tools-libs 3.10.0-514.26.1.el7, +6 more
    fixed: vendor fix RHSA-2017:1615
  • Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-696.3.1.el6, kernel-debuginfo-common-i686 2.6.32-696.3.1.el6, kernel-debuginfo-common-ppc64 2.6.32-696.3.1.el6, kernel-debuginfo-common-s390x 2.6.32-696.3.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.3.1.el6
    fixed: vendor fix RHSA-2017:1372
show 7 more
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-514.26.1.el7, kernel-debuginfo-common-x86_64 3.10.0-514.26.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-514.26.1.el7
    fixed: vendor fix RHSA-2017:1615
  • Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-696.3.1.el6, kernel 2.6.32-696.3.1.el6, kernel-firmware 2.6.32-696.3.1.el6, kernel-abi-whitelists 2.6.32-696.3.1.el6, kernel-debuginfo-common-i686 2.6.32-696.3.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.3.1.el6
    fixed: vendor fix RHSA-2017:1372
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-514.26.1.el7, kernel 3.10.0-514.26.1.el7, python-perf 3.10.0-514.26.1.el7, kernel-tools 3.10.0-514.26.1.el7, kernel-tools-libs 3.10.0-514.26.1.el7, kernel-abi-whitelists 3.10.0-514.26.1.el7, +1 more
    fixed: vendor fix RHSA-2017:1615
  • Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-696.3.1.el6, kernel-debuginfo-common-i686 2.6.32-696.3.1.el6, kernel-debuginfo-common-x86_64 2.6.32-696.3.1.el6
    fixed: vendor fix RHSA-2017:1372
  • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-514.26.1.el7
    fixed: vendor fix RHSA-2017:1615
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-514.rt56.228.el6rt, kernel-rt-trace 3.10.0-514.rt56.228.el6rt, kernel-rt-vanilla 3.10.0-514.rt56.228.el6rt, kernel-rt-firmware 3.10.0-514.rt56.228.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-514.rt56.228.el6rt
    fixed: vendor fix RHSA-2017:1647
  • 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

4.67% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition
Technology feeds

References

Sources

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.