RHEL 7 : kernel-alt (Unpatched Vulnerability)

critical Nessus Plugin ID 199918


The remote Red Hat 7 host is affected by multiple vulnerabilities that will not be patched.


The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

- kernel: stack-based buffer overflow in chap_server_compute_md5() in iscsi target (CVE-2018-14633)

- kernel: infinite loop in update_blocked_averages() in kernel/sched/fair.c leading to denial of service (CVE-2018-20784)

- The compat_get_timex function in kernel/compat.c in the Linux kernel before 4.16.9 allows local users to obtain sensitive information from kernel memory via adjtimex. (CVE-2018-11508)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.


The vendor has acknowledged the vulnerabilities but no solution has been provided. Refer to the vendor for remediation guidance.

Plugin Details

Severity: Critical

ID: 199918

File Name: redhat_unpatched_kernel-alt-rhel7.nasl

Version: 1.1

Type: local

Agent: unix

Published: 6/3/2024

Updated: 6/3/2024

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: High

Base Score: 8.3

Temporal Score: 6.5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:C

CVSS Score Source: CVE-2018-14633


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2018-20784

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:kernel-alt, cpe:/o:redhat:enterprise_linux:7

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 3/7/2018

Reference Information

CVE: CVE-2018-11508, CVE-2018-13093, CVE-2018-14633, CVE-2018-19854, CVE-2018-20784, CVE-2018-7740, CVE-2018-7754, CVE-2018-7755, CVE-2018-9385, CVE-2019-10140, CVE-2019-10207, CVE-2019-15117, CVE-2019-15925, CVE-2019-18198, CVE-2019-18809, CVE-2019-19068, CVE-2019-19529, CVE-2019-19543, CVE-2019-19602, CVE-2019-2024, CVE-2019-3882, CVE-2019-8980, CVE-2020-26541, CVE-2020-36312, CVE-2020-36385, CVE-2021-21781, CVE-2021-33033, CVE-2021-37576