The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a certain lock and consequently can…

published 2017-04-05 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-11815

cvss: 5.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits: 1; Exploit-DB

The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a certain lock and consequently cannot ensure that disconnect function calls are safe, which allows local users to cause a denial of service (panic) by leveraging access to the protocol value of IPPROTO_ICMP in a socket system call.

Patch / fix

distros 4 links 2

debian ubuntu red hat suse

linux Debian 14, Debian 13, Debian 12 4.9.25-1

debian advisories DEBIAN-CVE-2017-2671

linux Ubuntu 14.04 LTS 3.13.0-157.207
linux Ubuntu 16.04 LTS 4.4.0-79.100
linux-aws Ubuntu 16.04 LTS 4.4.0-1018.27
linux-gke Ubuntu 16.04 LTS 4.4.0-1014.14
linux-hwe Ubuntu 16.04 LTS 4.10.0-32.36~16.04.1
linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1057.64
linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-79.100~14.04.1
linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1059.63

ubuntu advisories UBUNTU-CVE-2017-2671

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 2.6.32-754.el6
perf RHEL 6 2.6.32-754.el6
python-perf RHEL 6 2.6.32-754.el6
kernel-kdump RHEL 6 2.6.32-754.el6
kernel-firmware RHEL 6 2.6.32-754.el6
kernel-bootwrapper RHEL 6 2.6.32-754.el6
kernel-abi-whitelists RHEL 6 2.6.32-754.el6
kernel-debuginfo-common-i686 RHEL 6 2.6.32-754.el6

red hat advisories RHSA-2018:1854 RHSA-2017:2669 RHSA-2017:2077 RHSA-2017:1842

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-2017:2525-1 SUSE-SU-2017:2342-1 SUSE-SU-2017:1990-1 SUSE-SU-2017:1360-1 SUSE-SU-2017:1301-1 SUSE-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-2017-2671 updated 2026-11-07 cvss 7.8

kernel: ping socket / AF_LLC connect() sin_family race

Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-693.el7, kernel 3.10.0-693.el7, python-perf 3.10.0-693.el7, kernel-tools 3.10.0-693.el7, kernel-tools-libs 3.10.0-693.el7, kernel-abi-whitelists 3.10.0-693.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-693.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-693.el7, kernel 3.10.0-693.el7, python-perf 3.10.0-693.el7, kernel-tools 3.10.0-693.el7, kernel-tools-libs 3.10.0-693.el7, kernel-abi-whitelists 3.10.0-693.el7, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-693.el7
fixed: vendor fix RHSA-2017:1842
Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-754.el6, kernel 2.6.32-754.el6, kernel-firmware 2.6.32-754.el6, kernel-abi-whitelists 2.6.32-754.el6, kernel-debuginfo-common-i686 2.6.32-754.el6, kernel-debuginfo-common-x86_64 2.6.32-754.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-754.el6, kernel-debuginfo-common-i686 2.6.32-754.el6, kernel-debuginfo-common-x86_64 2.6.32-754.el6
fixed: vendor fix RHSA-2018:1854
Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-693.rt56.617.el7, kernel-rt-trace 3.10.0-693.rt56.617.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-693.rt56.617.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-693.rt56.617.el7, kernel-rt-kvm 3.10.0-693.rt56.617.el7, kernel-rt-trace 3.10.0-693.rt56.617.el7, kernel-rt-debug-kvm 3.10.0-693.rt56.617.el7, kernel-rt-trace-kvm 3.10.0-693.rt56.617.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-693.rt56.617.el7
fixed: vendor fix RHSA-2017:2077
Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-754.el6, kernel 2.6.32-754.el6, kernel-firmware 2.6.32-754.el6, kernel-abi-whitelists 2.6.32-754.el6, kernel-debuginfo-common-i686 2.6.32-754.el6, kernel-debuginfo-common-x86_64 2.6.32-754.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-754.el6, kernel-debuginfo-common-x86_64 2.6.32-754.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-754.el6, kernel 2.6.32-754.el6, kernel-kdump 2.6.32-754.el6, kernel-firmware 2.6.32-754.el6, kernel-bootwrapper 2.6.32-754.el6, kernel-abi-whitelists 2.6.32-754.el6, +4 more
fixed: vendor fix RHSA-2018:1854
Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-693.el7, kernel 3.10.0-693.el7, python-perf 3.10.0-693.el7, kernel-kdump 3.10.0-693.el7, kernel-tools 3.10.0-693.el7, kernel-tools-libs 3.10.0-693.el7, +6 more
fixed: vendor fix RHSA-2017:1842
Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-754.el6, kernel-debuginfo-common-i686 2.6.32-754.el6, kernel-debuginfo-common-ppc64 2.6.32-754.el6, kernel-debuginfo-common-s390x 2.6.32-754.el6, kernel-debuginfo-common-x86_64 2.6.32-754.el6
fixed: vendor fix RHSA-2018:1854
Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-693.el7, kernel-debuginfo-common-x86_64 3.10.0-693.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.el7
fixed: vendor fix RHSA-2017:1842
Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-754.el6, kernel 2.6.32-754.el6, kernel-firmware 2.6.32-754.el6, kernel-abi-whitelists 2.6.32-754.el6, kernel-debuginfo-common-i686 2.6.32-754.el6, kernel-debuginfo-common-x86_64 2.6.32-754.el6
fixed: vendor fix RHSA-2018:1854

show 5 more

Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-693.el7, kernel 3.10.0-693.el7, python-perf 3.10.0-693.el7, kernel-tools 3.10.0-693.el7, kernel-tools-libs 3.10.0-693.el7, kernel-abi-whitelists 3.10.0-693.el7, +1 more
fixed: vendor fix RHSA-2017:1842
Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-754.el6, kernel-debuginfo-common-i686 2.6.32-754.el6, kernel-debuginfo-common-x86_64 2.6.32-754.el6
fixed: vendor fix RHSA-2018:1854
Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-693.el7
fixed: vendor fix RHSA-2017:1842
Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-693.2.1.rt56.585.el6rt, kernel-rt-trace 3.10.0-693.2.1.rt56.585.el6rt, kernel-rt-vanilla 3.10.0-693.2.1.rt56.585.el6rt, kernel-rt-firmware 3.10.0-693.2.1.rt56.585.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-693.2.1.rt56.585.el6rt
fixed: vendor fix RHSA-2017:2669
Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux Client (v. 7) kernel-headers 3.10.0-693.el7 Red Hat Enterprise Linux ComputeNode (v. 7) kernel-headers 3.10.0-693.el7 Red Hat Enterprise Linux Server (v. 7) kernel-headers 3.10.0-693.el7 Red Hat Enterprise Linux Workstation (v. 7) kernel-headers 3.10.0-693.el7
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

2017-04-05 Published
2017-06-07 First public exploit (EDB-42135)

Exploit prediction

1.46% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-42135 Linux Kernel - 'ping' Local Denial of Service dos, 2017-06-07

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

Linux kernel rss critical rss

References

github.com /torvalds/linux/commit/43a6684519ab0a6c52024b5e25322476cabad893
issue-tracking, patch, third-party-advisory
git.kernel.org /pub/scm/linux/kernel/git/davem/net.git/commit/net/ipv4/ping.c?id=43a6684519ab0a6c52024b5e25322476cabad893
issue-tracking, patch, third-party-advisory
exploit-db.com /exploits/42135/
exploit
access.redhat.com /errata/RHSA-2017:2669
vendor-advisory
access.redhat.com /errata/RHSA-2018:1854
vendor-advisory
usn.ubuntu.com /3754-1/
vendor-advisory
access.redhat.com /errata/RHSA-2017:2077
vendor-advisory
access.redhat.com /errata/RHSA-2017:1842
vendor-advisory
securityfocus.com /bid/97407
vdb-entry, third-party-advisory
openwall.com /lists/oss-security/2017/04/04/8
mailing-list, third-party-advisory
twitter.com /danieljiang0415/status/845116665184497664
third-party-advisory
github.com /danieljiang0415/android_kernel_crash_poc
third-party-advisory

Sources

CVE List CVE-2017-2671
NVD CVE-2017-2671

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.

Summary