Linux Distros Unpatched Vulnerability : CVE-2025-69873

high Nessus Plugin ID 298757

Language:

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- ajv (Another JSON Schema Validator) before 8.18.0 is vulnerable to Regular Expression Denial of Service (ReDoS) when the $data option is enabled. The pattern keyword accepts runtime data via JSON Pointer syntax ($data reference), which is passed directly to the JavaScript RegExp() constructor without validation. An attacker can inject a malicious regex pattern (e.g., ^(a|a)*$) combined with crafted input to cause catastrophic backtracking. A 31-character payload causes approximately 44 seconds of CPU blocking, with each additional character doubling execution time. This enables complete denial of service with a single HTTP request against any API using ajv with $data: true for dynamic schema validation. This issue is also fixed in version 6.14.0. (CVE-2025-69873)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 298757

File Name: unpatched_CVE_2025_69873.nasl

Version: 1.9

Type: local

Agent: unix

Family: Misc.

Published: 2/12/2026

Updated: 3/6/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2025-69873

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:grafana-azure-monitor, cpe:/o:centos:centos:8, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:grafana-opentsdb, p-cpe:/a:centos:centos:grafana-influxdb, p-cpe:/a:centos:centos:grafana-selinux, p-cpe:/a:centos:centos:grafana-mysql, p-cpe:/a:debian:debian_linux:node-ajv, p-cpe:/a:centos:centos:grafana-graphite, cpe:/o:debian:debian_linux:14.0, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:grafana-prometheus, p-cpe:/a:redhat:enterprise_linux:grafana-loki, p-cpe:/a:centos:centos:grafana-stackdriver, p-cpe:/a:redhat:enterprise_linux:grafana-stackdriver, p-cpe:/a:centos:centos:grafana-mssql, p-cpe:/a:redhat:enterprise_linux:grafana-mssql, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:grafana-cloudwatch, p-cpe:/a:centos:centos:grafana-loki, p-cpe:/a:redhat:enterprise_linux:grafana-influxdb, p-cpe:/a:centos:centos:grafana-azure-monitor, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:grafana, p-cpe:/a:centos:centos:grafana-elasticsearch, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:canonical:ubuntu_linux:node-ajv, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:grafana-elasticsearch, p-cpe:/a:centos:centos:grafana, p-cpe:/a:centos:centos:grafana-cloudwatch, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:redhat:enterprise_linux:grafana-postgres, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:redhat:enterprise_linux:grafana-prometheus, p-cpe:/a:redhat:enterprise_linux:grafana-selinux, p-cpe:/a:redhat:enterprise_linux:grafana-graphite, p-cpe:/a:centos:centos:grafana-opentsdb, p-cpe:/a:redhat:enterprise_linux:grafana-mysql, p-cpe:/a:centos:centos:grafana-postgres

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 2/11/2026

Reference Information

CVE: CVE-2025-69873

Detections

Analytics