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Linux Distros Unpatched Vulnerability : CVE-2026-19654

high Nessus Plugin ID 334997

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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.

 - A unauthenticated remote peer may lead rsyslogd to crash due to a flaw in the optional imptcp module. A crafted input sequence during oversize-frame recovery can cause an invalid internal message length and terminate rsyslogd. No confidentiality or integrity impact, privilege escalation, or code execution has been identified. imtcp and the default imptcp framing modes are not affected. (CVE-2026-19654)

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

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-19654

https://security-tracker.debian.org/tracker/CVE-2026-19654

https://ubuntu.com/security/CVE-2026-19654

Plugin Details

Severity: High

ID: 334997

File Name: unpatched_CVE_2026_19654.nasl

Version: 1.5

Type: Local

Agent: unix

Family: Misc.

Published: 8/12/2026

Updated: 8/27/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.65

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 7.7

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

CVSS Score Source: CVE-2026-19654

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:14.04:-:lts, 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:centos:centos:8, cpe:/o:debian:debian_linux:11.0, 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:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:rsyslog, p-cpe:/a:centos:centos:rsyslog-crypto, p-cpe:/a:centos:centos:rsyslog-doc, p-cpe:/a:centos:centos:rsyslog-elasticsearch, p-cpe:/a:centos:centos:rsyslog-gnutls, p-cpe:/a:centos:centos:rsyslog-gssapi, p-cpe:/a:centos:centos:rsyslog-kafka, p-cpe:/a:centos:centos:rsyslog-logrotate, p-cpe:/a:centos:centos:rsyslog-mmaudit, p-cpe:/a:centos:centos:rsyslog-mmfields, p-cpe:/a:centos:centos:rsyslog-mmjsonparse, p-cpe:/a:centos:centos:rsyslog-mmkubernetes, p-cpe:/a:centos:centos:rsyslog-mmnormalize, p-cpe:/a:centos:centos:rsyslog-mmsnmptrapd, p-cpe:/a:centos:centos:rsyslog-mysql, p-cpe:/a:centos:centos:rsyslog-omamqp1, p-cpe:/a:centos:centos:rsyslog-openssl, p-cpe:/a:centos:centos:rsyslog-pgsql, p-cpe:/a:centos:centos:rsyslog-relp, p-cpe:/a:centos:centos:rsyslog-snmp, p-cpe:/a:centos:centos:rsyslog-udpspoof, p-cpe:/a:centos:centos:rsyslog, p-cpe:/a:debian:debian_linux:rsyslog, p-cpe:/a:redhat:enterprise_linux:rsyslog-crypto, p-cpe:/a:redhat:enterprise_linux:rsyslog-doc, p-cpe:/a:redhat:enterprise_linux:rsyslog-elasticsearch, p-cpe:/a:redhat:enterprise_linux:rsyslog-gnutls, p-cpe:/a:redhat:enterprise_linux:rsyslog-gssapi, p-cpe:/a:redhat:enterprise_linux:rsyslog-kafka, p-cpe:/a:redhat:enterprise_linux:rsyslog-logrotate, p-cpe:/a:redhat:enterprise_linux:rsyslog-mmaudit, p-cpe:/a:redhat:enterprise_linux:rsyslog-mmfields, p-cpe:/a:redhat:enterprise_linux:rsyslog-mmjsonparse, p-cpe:/a:redhat:enterprise_linux:rsyslog-mmkubernetes, p-cpe:/a:redhat:enterprise_linux:rsyslog-mmnormalize, p-cpe:/a:redhat:enterprise_linux:rsyslog-mmsnmptrapd, p-cpe:/a:redhat:enterprise_linux:rsyslog-mysql, p-cpe:/a:redhat:enterprise_linux:rsyslog-omamqp1, p-cpe:/a:redhat:enterprise_linux:rsyslog-openssl, p-cpe:/a:redhat:enterprise_linux:rsyslog-pgsql, p-cpe:/a:redhat:enterprise_linux:rsyslog-relp, p-cpe:/a:redhat:enterprise_linux:rsyslog-snmp, p-cpe:/a:redhat:enterprise_linux:rsyslog-udpspoof, p-cpe:/a:redhat:enterprise_linux:rsyslog

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: 8/12/2026

Reference Information

CVE: CVE-2026-19654