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TI-2016-04947 Aliases CVE-2016-5696GHSA-26qg-wc7f-8867

net/ipv4/tcp_input.c in the Linux kernel before 4.7 does not properly determine the rate…

Priority LOW 37CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
None · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-200.

Summary

net/ipv4/tcp_input.c in the Linux kernel before 4.7 does not properly determine the rate of challenge ACK segments, which makes it easier for remote attackers to hijack TCP sessions via a blind in-window attack.

Why it matters now

EPSS 0.14507 96th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 8 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:google:android:*:*:*:*:*:*:*:*up to 7.0VulnerableGoogle
cpe:2.3:a:oracle:vm_server:3.3:*:*:*:*:*:*:*3.3VulnerableOracle
cpe:2.3:a:oracle:vm_server:3.4:*:*:*:*:*:*:*3.4VulnerableOracle
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*up to 4.6.6VulnerableLinux
  • cpe:2.3:o:google:android:*:*:*:*:*:*:*:* Versions up to 7.0 Vulnerable ·Google
  • cpe:2.3:a:oracle:vm_server:3.3:*:*:*:*:*:*:* Versions 3.3 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:vm_server:3.4:*:*:*:*:*:*:* Versions 3.4 Vulnerable ·Oracle
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 4.6.6 Vulnerable ·Linux

Remediation

Red Hat 8 advisories

  • RHSA-2016:1939 Released 2016-09-27 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux HPC Node EUS (v. 6.6) kernel-2.6.32-504.52.1.el6, kernel-abi-whitelists-2.6.32-504.52.1.el6, kernel-debug-2.6.32-504.52.1.el6 +6
    • Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6) python-perf-2.6.32-504.52.1.el6
    • Red Hat Enterprise Linux Server EUS (v. 6.6) kernel-2.6.32-504.52.1.el6, kernel-abi-whitelists-2.6.32-504.52.1.el6, kernel-bootwrapper-2.6.32-504.52.1.el6 +9
    • Red Hat Enterprise Linux Server Optional EUS (v. 6.6) python-perf-2.6.32-504.52.1.el6
  • RHSA-2016:1815 Released 2016-09-06 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux HPC Node EUS (v. 6.7) kernel-2.6.32-573.34.1.el6, kernel-abi-whitelists-2.6.32-573.34.1.el6, kernel-debug-2.6.32-573.34.1.el6 +6
    • Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) python-perf-2.6.32-573.34.1.el6
    • Red Hat Enterprise Linux Server EUS (v. 6.7) kernel-2.6.32-573.34.1.el6, kernel-abi-whitelists-2.6.32-573.34.1.el6, kernel-bootwrapper-2.6.32-573.34.1.el6 +9
    • Red Hat Enterprise Linux Server Optional EUS (v. 6.7) python-perf-2.6.32-573.34.1.el6
  • RHSA-2016:1814 Released 2016-09-06 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 6.5) kernel-2.6.32-431.73.2.el6, kernel-abi-whitelists-2.6.32-431.73.2.el6, kernel-debug-2.6.32-431.73.2.el6 +6
    • Red Hat Enterprise Linux Server Optional AUS (v. 6.5) kernel-2.6.32-431.73.2.el6, python-perf-2.6.32-431.73.2.el6
Show 5 more Red Hat advisories
  • RHSA-2016:1664 Released 2016-08-23 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Desktop (v. 6) kernel-2.6.32-642.4.2.el6, kernel-abi-whitelists-2.6.32-642.4.2.el6, kernel-debug-2.6.32-642.4.2.el6 +6
    • Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf-2.6.32-642.4.2.el6
    • Red Hat Enterprise Linux HPC Node (v. 6) kernel-2.6.32-642.4.2.el6, kernel-abi-whitelists-2.6.32-642.4.2.el6, kernel-debug-2.6.32-642.4.2.el6 +6
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf-2.6.32-642.4.2.el6
    • Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-642.4.2.el6, kernel-abi-whitelists-2.6.32-642.4.2.el6, kernel-bootwrapper-2.6.32-642.4.2.el6 +9
    • Red Hat Enterprise Linux Server Optional (v. 6) python-perf-2.6.32-642.4.2.el6
    • Red Hat Enterprise Linux Workstation (v. 6) kernel-2.6.32-642.4.2.el6, kernel-abi-whitelists-2.6.32-642.4.2.el6, kernel-debug-2.6.32-642.4.2.el6 +6
    • Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf-2.6.32-642.4.2.el6
  • RHSA-2016:1657 Released 2016-08-23 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) kernel-3.10.0-229.40.1.el7, kernel-abi-whitelists-3.10.0-229.40.1.el7, kernel-debug-3.10.0-229.40.1.el7 +7
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) kernel-tools-libs-devel-3.10.0-229.40.1.el7, python-perf-3.10.0-229.40.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.1) kernel-3.10.0-229.40.1.ael7b, kernel-3.10.0-229.40.1.el7, kernel-abi-whitelists-3.10.0-229.40.1.ael7b +20
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.1) kernel-debug-devel-3.10.0-229.40.1.ael7b, kernel-tools-libs-devel-3.10.0-229.40.1.ael7b, kernel-tools-libs-devel-3.10.0-229.40.1.el7 +2
  • RHSA-2016:1633 Released 2016-08-18 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) kernel-3.10.0-327.28.3.el7, kernel-abi-whitelists-3.10.0-327.28.3.el7, kernel-debug-3.10.0-327.28.3.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-327.28.3.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) kernel-3.10.0-327.28.3.el7, kernel-abi-whitelists-3.10.0-327.28.3.el7, kernel-debug-3.10.0-327.28.3.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-327.28.3.el7
    • Red Hat Enterprise Linux Server (v. 7) kernel-3.10.0-327.28.3.el7, kernel-abi-whitelists-3.10.0-327.28.3.el7, kernel-bootwrapper-3.10.0-327.28.3.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-327.28.3.el7, kernel-tools-libs-devel-3.10.0-327.28.3.el7
    • Red Hat Enterprise Linux Workstation (v. 7) kernel-3.10.0-327.28.3.el7, kernel-abi-whitelists-3.10.0-327.28.3.el7, kernel-debug-3.10.0-327.28.3.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-327.28.3.el7
  • RHSA-2016:1631 Released 2016-08-18 · Red Hat rating Important
    realtime-kernel security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-1:3.10.0-327.rt56.195.el6rt, kernel-rt-debug-1:3.10.0-327.rt56.195.el6rt, kernel-rt-debug-devel-1:3.10.0-327.rt56.195.el6rt +7
  • RHSA-2016:1632 Released 2016-08-18 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt-3.10.0-327.28.3.rt56.235.el7, kernel-rt-debug-3.10.0-327.28.3.rt56.235.el7, kernel-rt-debug-devel-3.10.0-327.28.3.rt56.235.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-327.28.3.rt56.235.el7, kernel-rt-debug-3.10.0-327.28.3.rt56.235.el7, kernel-rt-debug-devel-3.10.0-327.28.3.rt56.235.el7 +7

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2016:1633
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:1633
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2016:1633
Red Hat Enterprise Linux ComputeNode EUS (v. 7.1)Fixed RHSA-2016:1657
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2016:1633
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1)Fixed RHSA-2016:1657
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2016:1664
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2016:1664
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2016:1664
Red Hat Enterprise Linux HPC Node EUS (v. 6.6)Fixed RHSA-2016:1939
Red Hat Enterprise Linux HPC Node EUS (v. 6.7)Fixed RHSA-2016:1815
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2016:1664
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6)Fixed RHSA-2016:1939
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7)Fixed RHSA-2016:1815
Red Hat Enterprise Linux Realtime (v. 7)Fixed RHSA-2016:1632
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:1664
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:1633
Red Hat Enterprise Linux Server AUS (v. 6.5)Fixed RHSA-2016:1814
Red Hat Enterprise Linux Server EUS (v. 6.6)Fixed RHSA-2016:1939
Red Hat Enterprise Linux Server EUS (v. 6.7)Fixed RHSA-2016:1815
Red Hat Enterprise Linux Server EUS (v. 7.1)Fixed RHSA-2016:1657
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2016:1664
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2016:1633
Red Hat Enterprise Linux Server Optional AUS (v. 6.5)Fixed RHSA-2016:1814
Red Hat Enterprise Linux Server Optional EUS (v. 6.6)Fixed RHSA-2016:1939
Red Hat Enterprise Linux Server Optional EUS (v. 6.7)Fixed RHSA-2016:1815
Red Hat Enterprise Linux Server Optional EUS (v. 7.1)Fixed RHSA-2016:1657
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2016:1664
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:1633
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2016:1664
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2016:1633
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2016:1632
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2016:1631
Not affected: 2 products
  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-5696
  2. 2026-10-03 Alias added: GHSA-26qg-wc7f-8867

References

Exploit 1

Patch 2

Advisory 20

Other 7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences