The TCP stack in the Linux kernel before 4.8.10 mishandles skb truncation, which allows local users to cause a denial of service (system cr…

published 2016-11-28 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-9485

cvss: 5.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits: 0; none known

The TCP stack in the Linux kernel before 4.8.10 mishandles skb truncation, which allows local users to cause a denial of service (system crash) via a crafted application that makes sendto system calls, related to net/ipv4/tcp_ipv4.c and net/ipv6/tcp_ipv6.c.

Patch / fix

distros 4 links 2

debian ubuntu red hat suse

linux Debian 14, Debian 13, Debian 12 4.8.11-1

debian advisories DEBIAN-CVE-2016-8645

linux Ubuntu 14.04 LTS 3.13.0-119.166
linux Ubuntu 16.04 LTS 4.4.0-57.78
linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1038.45
linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-57.78~14.04.1
linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1042.46

ubuntu advisories UBUNTU-CVE-2016-8645

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 1:3.10.0-693.2.1.rt56.585.el6rt
kernel-rt-trace enterprise mrg 2 1:3.10.0-693.2.1.rt56.585.el6rt
kernel-rt-vanilla enterprise mrg 2 1:3.10.0-693.2.1.rt56.585.el6rt
kernel-rt-firmware enterprise mrg 2 1:3.10.0-693.2.1.rt56.585.el6rt
kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 1:3.10.0-693.2.1.rt56.585.el6rt
kernel-rt RHEL 7 EXTRAS_RT 3.10.0-693.rt56.617.el7
kernel-rt-kvm RHEL 7 EXTRAS_RT 3.10.0-693.rt56.617.el7
kernel-rt-trace RHEL 7 EXTRAS_RT 3.10.0-693.rt56.617.el7

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

kernel-ec2 SLE Module for Public Cloud 12 3.12.61-52.66.1
kernel-ec2 SLE Module for Public Cloud 12 3.12.69-60.64.29.1
kernel-xen SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.69-60.64.29.1
kernel-syms SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.69-60.64.29.1
kernel-source SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.69-60.64.29.1
kernel-default SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 +1 more 3.12.69-60.64.29.1
kernel-obs-build SLE Software Development Kit 12 SP1 3.12.69-60.64.29.1
kernel-rt SLE Real Time 12 SP1 3.12.69-60.30.1

suse advisories SUSE-SU-2017:0471-1 SUSE-SU-2017:0464-1 SUSE-SU-2017:0407-1 SUSE-SU-2017:0181-1

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-2016-8645 updated 2026-11-07 cvss 6.2

kernel: a BUG() statement can be hit in net/ipv4/tcp_input.c

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 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 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 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 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 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 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more 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

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% 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

Weakness

CWE-284 Improper Access Control

Technology feeds

Linux kernel rss critical rss

References

git.kernel.org /cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ac6e780070e30e4c35bd395acfe9191e6268bdd3
issue-tracking, patch, vendor-advisory
github.com /torvalds/linux/commit/ac6e780070e30e4c35bd395acfe9191e6268bdd3
issue-tracking, patch, third-party-advisory
access.redhat.com /errata/RHSA-2017:2669
vendor-advisory
access.redhat.com /errata/RHSA-2017:2077
vendor-advisory
access.redhat.com /errata/RHSA-2017:1842
vendor-advisory
openwall.com /lists/oss-security/2016/11/30/3
mailing-list
bugzilla.redhat.com /show_bug.cgi?id=1393904
issue-tracking
securityfocus.com /bid/94264
vdb-entry, third-party-advisory
securitytracker.com /id/1037285
vdb-entry
kernel.org /pub/linux/kernel/v4.x/ChangeLog-4.8.10
release-notes
openwall.com /lists/oss-security/2016/11/11/3
mailing-list, third-party-advisory

Sources

CVE List CVE-2016-8645
NVD CVE-2016-8645

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.

Summary