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CVE-2016-4997

HighPublished

The compat IPT_SO_SET_REPLACE and IP6T_SO_SET_REPLACE setsockopt implementations in the netfilter subsystem in the Linux kernel before 4.6.3 allow local...

Published: Jul 3, 2016
Updated: Aug 6, 2024
Assigning CNA: redhat
Evidence observed: Sep 27, 2016

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

5.7%

Low · next 30 days

Percentile: 92.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The compat IPT_SO_SET_REPLACE and IP6T_SO_SET_REPLACE setsockopt implementations in the netfilter subsystem in the Linux kernel before 4.6.3 allow local users to gain privileges or cause a denial of service (memory corruption) by leveraging in-container root access to provide a crafted offset value that triggers an unintended decrement.

Sources

Linux Kernel 4.6.3 (x86) - 'Netfilter' Local Privilege Escalation (Metasploit)Exploit
Metasploit · linux_x86 · Sep 27, 2016
Linux Kernel 4.6.2 (Ubuntu 16.04.1) - 'IP6T_SO_SET_REPLACE' Local Privilege EscalationExploit
Qian Zhang · linux · Oct 10, 2016

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