CVE-2016-4997
kernel: compat IPT_SO_SET_REPLACE setsockopt
Severity
ImportantRed Hat Product Security
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 · 7.3CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 · 7.2AV:L/AC:L/Au:N/C:C/I:C/A:C
CWE-20 · Improper Input Validation