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CVE-2026-78002

Fixed in a distro release EPSS <1%CVSS 7.5

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.

Published 2026-08-27 · CVE record · OSV

Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Update Infrastructure 5, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7

Distro releases

ReleasePackageFixed in
AlmaLinux 10rsyslog8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-crypto8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-doc8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-elasticsearch8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-gnutls8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-gssapi8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-kafka8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-mmaudit8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-mmfields8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-mmjsonparse8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-mmkubernetes8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-mmnormalize8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-mmsnmptrapd8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-mysql8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-omamqp18.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-openssl8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-pgsql8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-relp8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-snmp8.2510.0-5.el10_2.2
AlmaLinux 10rsyslog-udpspoof8.2510.0-5.el10_2.2
AlmaLinux 8rsyslog8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-crypto8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-doc8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-elasticsearch8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-gnutls8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-gssapi8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-kafka8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-mmaudit8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-mmfields8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-mmjsonparse8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-mmkubernetes8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-mmnormalize8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-mmsnmptrapd8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-mysql8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-omamqp18.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-openssl8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-pgsql8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-relp8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-snmp8.2102.0-15.el8_10.3
AlmaLinux 8rsyslog-udpspoof8.2102.0-15.el8_10.3
AlmaLinux 9rsyslog8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-crypto8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-doc8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-elasticsearch8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-gnutls8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-gssapi8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-kafka8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-logrotate8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-mmaudit8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-mmfields8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-mmjsonparse8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-mmkubernetes8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-mmnormalize8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-mmsnmptrapd8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-mysql8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-omamqp18.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-openssl8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-pgsql8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-relp8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-snmp8.2510.0-2.el9_8.2
AlmaLinux 9rsyslog-udpspoof8.2510.0-2.el9_8.2
Debian 12rsyslogno fix
Debian 13rsyslog8.2504.0-1+deb13u2
Debian 14rsyslog8.2608.0-4
Red Hat Enterprise Linux 10.2rsyslog0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-crypto0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-crypto-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-debugsource0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-doc0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-elasticsearch0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-elasticsearch-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-gnutls0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-gnutls-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-gssapi0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-gssapi-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-kafka0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-kafka-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmaudit0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmaudit-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmfields0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmfields-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmjsonparse0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmjsonparse-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmkubernetes0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmkubernetes-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmnormalize0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmnormalize-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmsnmptrapd0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mmsnmptrapd-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mysql0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-mysql-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-omamqp10:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-omamqp1-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-openssl0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-openssl-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-pgsql0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-pgsql-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-relp0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-relp-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-snmp0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-snmp-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-udpspoof0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 10.2rsyslog-udpspoof-debuginfo0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 8rsyslog0:8.2102.0-15.el8_10.3
Red Hat Enterprise Linux 8rsyslog-debuginfo0:8.2102.0-15.el8_10.3
Red Hat Enterprise Linux 8rsyslog-debugsource0:8.2102.0-15.el8_10.3
Red Hat Enterprise Linux 8rsyslog-doc0:8.2102.0-15.el8_10.3
Red Hat Enterprise Linux 9rsyslog0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-crypto0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-crypto-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-debugsource0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-doc0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-elasticsearch0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-elasticsearch-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-gnutls0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-gnutls-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-gssapi0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-gssapi-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-kafka0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-kafka-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-logrotate0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmaudit0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmaudit-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmfields0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmfields-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmjsonparse0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmjsonparse-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmkubernetes0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmkubernetes-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmnormalize0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmnormalize-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmsnmptrapd0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mmsnmptrapd-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mysql0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-mysql-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-omamqp10:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-omamqp1-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-openssl0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-openssl-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-pgsql0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-pgsql-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-relp0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-relp-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-snmp0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-snmp-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-udpspoof0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux 9rsyslog-udpspoof-debuginfo0:8.2510.0-2.el9_8.2
Red Hat Enterprise Linux eus 10.0rsyslog0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-crypto0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-debugsource0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-doc0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-elasticsearch0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-gnutls0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-gssapi0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-kafka0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-mmaudit0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-mmfields0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-mmjsonparse0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-mmkubernetes0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-mmnormalize0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-mmsnmptrapd0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-mysql0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-omamqp10:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-openssl0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-pgsql0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-relp0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-snmp0:8.2412.0-1.el10_0.2
Red Hat Enterprise Linux eus 10.0rsyslog-udpspoof0:8.2412.0-1.el10_0.2
Red Hat rhel eus 9.6rsyslog0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-crypto0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-crypto-debuginfo0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-debuginfo0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-debugsource0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-elasticsearch0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-gnutls0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-gssapi0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-kafka0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-logrotate0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-mmaudit0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-mmfields0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-mmfields-debuginfo0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-mmjsonparse0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-mmkubernetes0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-mmnormalize0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-mmsnmptrapd0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-mysql0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-omamqp10:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-openssl0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-openssl-debuginfo0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-pgsql0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-relp0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-snmp0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-snmp-debuginfo0:8.2412.0-1.el9_6.2
Red Hat rhel eus 9.6rsyslog-udpspoof0:8.2412.0-1.el9_6.2
Rocky Linux 10rsyslog0:8.2510.0-5.el10_2.2
Rocky Linux 8rsyslog0:8.2102.0-15.el8_10.3
Rocky Linux 9rsyslog0:8.2510.0-2.el9_8.2
SUSE Linux Enterprise Module for Basesystem 15 SP7rsyslog8.2608.0-150700.3.24.1
SUSE Linux Enterprise Module for Package Hub 15 SP7rsyslog8.2608.0-150700.3.24.1
SUSE Linux Enterprise Module for Server Applications 15 SP7rsyslog8.2608.0-150700.3.24.1
Ubuntu 22.04 LTSrsyslog8.2112.0-2ubuntu2.5
Ubuntu 24.04 LTSrsyslog8.2312.0-3ubuntu9.4
Ubuntu 26.04 LTSrsyslog8.2512.0-1ubuntu4.2
Ubuntu Pro 16.04 LTSrsyslog8.16.0-1ubuntu3.1+esm3
Ubuntu Pro 18.04 LTSrsyslog8.32.0-1ubuntu4.2+esm1
Ubuntu Pro 20.04 LTSrsyslog8.2001.0-1ubuntu1.3+esm1