Detections
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Oracle Linux 9 : nginx (ELSA-2026-18029)

critical Nessus Plugin ID 315747

Synopsis

The remote Oracle Linux host is missing a security update.

Description

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-18029 advisory.

 - Resolves: RHEL-176230 - nginx: NGINX: Arbitrary Code Execution Vulnerability (CVE-2026-42945)
 - Resolves: RHEL-159557 - CVE-2026-27654 nginx: NGINX: Denial of Service or file modification via buffer overflow in ngx_http_dav_module
 - Resolves: RHEL-159536 - CVE-2026-27784 nginx: NGINX: Denial of Service due to memory corruption via crafted MP4 file
 - Resolves: RHEL-159444 - CVE-2026-27651 nginx: NGINX: Denial of Service via undisclosed requests when ngx_mail_auth_http_module is enabled
 - Resolves: RHEL-157885 - CVE-2026-32647 nginx: NGINX: Denial of Service or Code Execution via specially crafted MP4 files

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://linux.oracle.com/errata/ELSA-2026-18029.html

Plugin Details

Severity: Critical

ID: 315747

File Name: oraclelinux_ELSA-2026-18029.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/20/2026

Updated: 5/20/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.4

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 6

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

CVSS Score Source: CVE-2026-42945

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 8.2

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:oracle:linux:nginx, p-cpe:/a:oracle:linux:nginx-all-modules, p-cpe:/a:oracle:linux:nginx-filesystem, p-cpe:/a:oracle:linux:nginx-mod-http-image-filter, p-cpe:/a:oracle:linux:nginx-mod-http-perl, p-cpe:/a:oracle:linux:nginx-mod-http-xslt-filter, p-cpe:/a:oracle:linux:nginx-mod-mail, p-cpe:/a:oracle:linux:nginx-mod-stream, cpe:/o:oracle:linux:9, p-cpe:/a:oracle:linux:nginx-mod-devel, p-cpe:/a:oracle:linux:nginx-core

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/19/2026

Vulnerability Publication Date: 5/13/2026

Reference Information

CVE: CVE-2026-42945