CVE Database›CVE-2016-4997

CVE-2016-4997

kernel: compat IPT_SO_SET_REPLACE setsockopt

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Severity

Important

Red Hat Product Security

7.3

CVSS 3.0

Review impact separately from score.

Published · June 24, 2016

Updated · June 28, 2026

Description

A flaw was discovered in processing setsockopt for 32 bit processes on 64 bit systems. This flaw will allow attackers to alter arbitrary kernel memory when unloading a kernel module. This action is usually restricted to root-privileged users but can also be leveraged if the kernel is compiled with CONFIG_USER_NS and CONFIG_NET_NS and the user is granted elevated privileges.

Statement

This issue affects the Linux kernels as shipped with Red Hat Enterprise Linux 7, MRG-2 and realtime and will be addressed in a future update.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 7.3
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS 2.0 · 7.2
AV:L/AC:L/Au:N/C:C/I:C/A:C

CWE-20 · Improper Input Validation