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Linux Distros Unpatched Vulnerability : CVE-2026-78002

high Nessus Plugin ID 341131

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 flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the RainerScript `replace()` function by sending specially crafted syslog messages. This vulnerability arises from an incorrect buffer size calculation during string replacement, causing memory corruption. Successful exploitation can lead to a denial of service (DoS) for the affected system. (CVE-2026-78002)

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-2026-78002

https://security-tracker.debian.org/tracker/CVE-2026-78002

Plugin Details

Severity: High

ID: 341131

File Name: unpatched_CVE_2026_78002.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 8/27/2026

Updated: 8/27/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

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-2026-78002

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:centos:centos:7, 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:6, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, 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-libdbi, 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:rsyslog7-elasticsearch, p-cpe:/a:centos:centos:rsyslog7-gnutls, p-cpe:/a:centos:centos:rsyslog7-gssapi, p-cpe:/a:centos:centos:rsyslog7-mysql, p-cpe:/a:centos:centos:rsyslog7-pgsql, p-cpe:/a:centos:centos:rsyslog7-relp, p-cpe:/a:centos:centos:rsyslog7-snmp, p-cpe:/a:centos:centos:rsyslog7, 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-libdbi, 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:rsyslog7-elasticsearch, p-cpe:/a:redhat:enterprise_linux:rsyslog7-gnutls, p-cpe:/a:redhat:enterprise_linux:rsyslog7-gssapi, p-cpe:/a:redhat:enterprise_linux:rsyslog7-mysql, p-cpe:/a:redhat:enterprise_linux:rsyslog7-pgsql, p-cpe:/a:redhat:enterprise_linux:rsyslog7-relp, p-cpe:/a:redhat:enterprise_linux:rsyslog7-snmp, p-cpe:/a:redhat:enterprise_linux:rsyslog7, 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: 8/27/2026

Reference Information

CVE: CVE-2026-78002