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Oracle Linux 8 : nginx:1.24 (ELSA-2026-38847)

critical Nessus Plugin ID 326806

Synopsis

The remote Oracle Linux host is missing a security update.

Description

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-38847 advisory.

 - Resolves: RHEL-188406 - nginx: NGINX: Arbitrary code execution or.
 Denial of Service via heap-based buffer overflow with crafted HTTP/2 headers (CVE-2026-42055)
 - Resolves: RHEL-178676 - nginx:1.24/nginx: code execution and denial of service (CVE-2026-9256)
 - Resolves: RHEL-176224 - nginx:1.24/nginx: NGINX: Arbitrary Code Execution Vulnerability (CVE-2026-42945)
 - Resolves: RHEL-157877 CVE-2026-32647 nginx:1.24/nginx: NGINX: Denial of Service or Code Execution via specially crafted MP4 files
 - Resolves: RHEL-159436 CVE-2026-27651 nginx:1.24/nginx: NGINX: Denial of Service via undisclosed requests when ngx_mail_auth_http_module is enabled
 - Resolves: RHEL-159549 CVE-2026-27654 nginx:1.24/nginx: NGINX: Denial of Service or file modification via buffer overflow in ngx_http_dav_module
 - Resolves: RHEL-159528 CVE-2026-27784 nginx:1.24/nginx: NGINX: Denial of Service due to memory corruption via crafted MP4 file
 - Resolves: RHEL-146517 - nginx:1.24/nginx: NGINX: Data injection via man-in-the-middle attack on TLS proxied connections (CVE-2026-1642)
 - Resolves: RHEL-12728 - nginx:1.22/nginx: HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)(CVE-2023-44487)

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-2026-38847.html

Plugin Details

Severity: Critical

ID: 326806

File Name: oraclelinux_ELSA-2026-38847.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 7/14/2026

Updated: 7/14/2026

Supported Sensors: Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.7

Percentile: 99.06

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-42055

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 7.2

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:P/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-mod-http-image-filter, p-cpe:/a:oracle:linux:nginx-filesystem, p-cpe:/a:oracle:linux:nginx-mod-stream, p-cpe:/a:oracle:linux:nginx-all-modules, cpe:/o:oracle:linux:8, p-cpe:/a:oracle:linux:nginx, 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-devel, p-cpe:/a:oracle:linux:nginx-mod-mail

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/14/2026

Vulnerability Publication Date: 6/17/2026

Reference Information

CVE: CVE-2026-42055

IAVA: 2026-A-0601