Detections
Analytics
RHEL 9 : rsyslog (RHSA-2026:84576)
high Nessus Plugin ID 367229
Synopsis
The remote Red Hat host is missing one or more security updates for rsyslog.Description
The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:84576 advisory.The rsyslog packages provide an enhanced, multi-threaded syslog daemon. It supports MySQL, syslog/TCP, RFC 3195, permitted sender lists, filtering on any message part, and fine-grained control over output format.
Security Fix(es):
* rsyslog: A configuration-dependent issue in rsyslog's optional imptcp input module can allow an unauthenticated remote peer to crash rsyslogd (CVE-2026-19654)
* rsyslog: rsyslog: Denial of service via heap buffer overflow in RainerScript replace() function (CVE-2026-78002)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the RHEL rsyslog package based on the guidance in RHSA-2026:84576.See Also
https://access.redhat.com/errata/RHSA-2026:84576
https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2502868
Plugin Details
Severity: High
ID: 367229
File Name: redhat-RHSA-2026-84576.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Red Hat Local Security Checks
Published: 10/19/2026
Updated: 10/19/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5
Percentile: 93.13
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2026-78002
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
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:O/RC:C
Vulnerability Information
CPE: cpe:/o:redhat:rhel_eus:9.6, p-cpe:/a:redhat:enterprise_linux:rsyslog-crypto, 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/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 10/19/2026
Vulnerability Publication Date: 8/12/2026
Reference Information
CVE: CVE-2026-19654, CVE-2026-78002
RHSA: 2026:84576