Linux Distros Unpatched Vulnerability : CVE-2026-89425

high Nessus Plugin ID 349334

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.

- UTF8DataInputJsonParser._reportInvalidToken() in FasterXML jackson-core builds the offending-token text for its error message by appending Java identifier characters to a StringBuilder in a loop that has no upper bound. Unlike the three sibling parser implementations, including UTF8StreamJsonParser, it never consults ErrorReportConfiguration.getMaxErrorTokenLength() (default 256). A malformed token supplied to a parser created through JsonFactory.createParser(DataInput) is therefore accumulated in full. No StreamReadConstraints setting mitigates this: maxDocumentLength cannot be applied to DataInput sources at all, and maxStringLength does not cover this path because the accumulation bypasses ReadConstrainedTextBuffer. The reporter measured a 20,000,109-character exception message from a 20-million-character malformed token on the DataInput path, against 367 characters for identical input on the InputStream path. Scaling the payload drives the StringBuilder, which also incurs byte-to-char expansion and internal array doubling, to many times the raw payload size and can trigger OutOfMemoryError for the whole JVM. UTF8DataInputJsonParser was introduced in 2.8.0 together with createParser(DataInput);
releases before 2.8.0 do not contain the affected class. (CVE-2026-89425)

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: 349334

File Name: unpatched_CVE_2026_89425.nasl

Version: 1.5

Type: Local

Agent: unix

Family: Misc.

Published: 9/23/2026

Updated: 9/25/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.61

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.6

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

CVSS Score Source: CVE-2026-89425

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: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:jackson-core, p-cpe:/a:centos:centos:idm-jss-javadoc, p-cpe:/a:centos:centos:idm-jss, p-cpe:/a:centos:centos:idm-ldapjdk-javadoc, p-cpe:/a:centos:centos:idm-ldapjdk, p-cpe:/a:centos:centos:idm-pki-acme, p-cpe:/a:centos:centos:idm-pki-base-java, p-cpe:/a:centos:centos:idm-pki-base, p-cpe:/a:centos:centos:idm-pki-ca, p-cpe:/a:centos:centos:idm-pki-est, p-cpe:/a:centos:centos:idm-pki-java, p-cpe:/a:centos:centos:idm-pki-kra, p-cpe:/a:centos:centos:idm-pki-server, p-cpe:/a:centos:centos:idm-pki-symkey, p-cpe:/a:centos:centos:idm-pki-tools, p-cpe:/a:centos:centos:idm-tomcatjss, p-cpe:/a:centos:centos:jss-javadoc, p-cpe:/a:centos:centos:jss, p-cpe:/a:centos:centos:ldapjdk-javadoc, p-cpe:/a:centos:centos:ldapjdk, p-cpe:/a:centos:centos:pki-acme, p-cpe:/a:centos:centos:pki-base-java, p-cpe:/a:centos:centos:pki-base, p-cpe:/a:centos:centos:pki-ca, p-cpe:/a:centos:centos:pki-core, p-cpe:/a:centos:centos:pki-kra, p-cpe:/a:centos:centos:pki-server, p-cpe:/a:centos:centos:pki-symkey, p-cpe:/a:centos:centos:pki-tools, p-cpe:/a:centos:centos:python3-idm-pki, p-cpe:/a:centos:centos:python3-pki, p-cpe:/a:centos:centos:resteasy-javadoc, p-cpe:/a:centos:centos:resteasy, p-cpe:/a:centos:centos:tomcatjss, p-cpe:/a:debian:debian_linux:jackson-core, p-cpe:/a:redhat:enterprise_linux:idm-jss-javadoc, p-cpe:/a:redhat:enterprise_linux:idm-jss, p-cpe:/a:redhat:enterprise_linux:idm-ldapjdk-javadoc, p-cpe:/a:redhat:enterprise_linux:idm-ldapjdk, p-cpe:/a:redhat:enterprise_linux:idm-pki-acme, p-cpe:/a:redhat:enterprise_linux:idm-pki-base-java, p-cpe:/a:redhat:enterprise_linux:idm-pki-base, p-cpe:/a:redhat:enterprise_linux:idm-pki-ca, p-cpe:/a:redhat:enterprise_linux:idm-pki-est, p-cpe:/a:redhat:enterprise_linux:idm-pki-java, p-cpe:/a:redhat:enterprise_linux:idm-pki-kra, p-cpe:/a:redhat:enterprise_linux:idm-pki-server, p-cpe:/a:redhat:enterprise_linux:idm-pki-symkey, p-cpe:/a:redhat:enterprise_linux:idm-pki-tools, p-cpe:/a:redhat:enterprise_linux:idm-tomcatjss, p-cpe:/a:redhat:enterprise_linux:jss-javadoc, p-cpe:/a:redhat:enterprise_linux:jss, p-cpe:/a:redhat:enterprise_linux:ldapjdk-javadoc, p-cpe:/a:redhat:enterprise_linux:ldapjdk, p-cpe:/a:redhat:enterprise_linux:pki-acme, p-cpe:/a:redhat:enterprise_linux:pki-base-java, p-cpe:/a:redhat:enterprise_linux:pki-base, p-cpe:/a:redhat:enterprise_linux:pki-ca, p-cpe:/a:redhat:enterprise_linux:pki-core, p-cpe:/a:redhat:enterprise_linux:pki-kra, p-cpe:/a:redhat:enterprise_linux:pki-server, p-cpe:/a:redhat:enterprise_linux:pki-symkey, p-cpe:/a:redhat:enterprise_linux:pki-tools, p-cpe:/a:redhat:enterprise_linux:python3-idm-pki, p-cpe:/a:redhat:enterprise_linux:python3-pki, p-cpe:/a:redhat:enterprise_linux:resteasy-javadoc, p-cpe:/a:redhat:enterprise_linux:resteasy, p-cpe:/a:redhat:enterprise_linux:tomcatjss

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/23/2026

Reference Information

CVE: CVE-2026-89425

Detections

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