RLSA-2026:98558: Important: rsyslog security update

Published Nov 13, 2026
·
Updated

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: 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.

Affected Software

40 affected componentsFixes available
rocky-linux/rsyslog-kafka<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmaudit<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-openssl-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mysql<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmnormalize-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-elasticsearch<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mysql-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmkubernetes<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-omamqp1<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-pgsql-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmsnmptrapd<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmkubernetes-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-crypto<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-gnutls<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmjsonparse-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmnormalize<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-snmp-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmjsonparse<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmaudit-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmsnmptrapd-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-pgsql<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-omamqp1-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-gssapi<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmfields-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-relp<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-mmfields<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-kafka-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-snmp<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-crypto-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-udpspoof-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-openssl<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-gnutls-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-elasticsearch-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-relp-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-debugsource<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-gssapi-debuginfo<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-udpspoof<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1
rocky-linux/rsyslog-doc<0:8.2604.0-5.el10_3.1
0:8.2604.0-5.el10_3.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade rocky-linux/rsyslog-kafka to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  2. Upgrade

    Upgrade rocky-linux/rsyslog-mmaudit to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  3. Upgrade

    Upgrade rocky-linux/rsyslog-openssl-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  4. Upgrade

    Upgrade rocky-linux/rsyslog-mysql to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  5. Upgrade

    Upgrade rocky-linux/rsyslog-mmnormalize-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  6. Upgrade

    Upgrade rocky-linux/rsyslog-elasticsearch to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  7. Upgrade

    Upgrade rocky-linux/rsyslog-mysql-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  8. Upgrade

    Upgrade rocky-linux/rsyslog-mmkubernetes to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  9. Upgrade

    Upgrade rocky-linux/rsyslog-omamqp1 to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  10. Upgrade

    Upgrade rocky-linux/rsyslog-pgsql-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  11. Upgrade

    Upgrade rocky-linux/rsyslog-mmsnmptrapd to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  12. Upgrade

    Upgrade rocky-linux/rsyslog-mmkubernetes-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  13. Upgrade

    Upgrade rocky-linux/rsyslog-crypto to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  14. Upgrade

    Upgrade rocky-linux/rsyslog-gnutls to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  15. Upgrade

    Upgrade rocky-linux/rsyslog to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  16. Upgrade

    Upgrade rocky-linux/rsyslog-mmjsonparse-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  17. Upgrade

    Upgrade rocky-linux/rsyslog-mmnormalize to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  18. Upgrade

    Upgrade rocky-linux/rsyslog-snmp-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  19. Upgrade

    Upgrade rocky-linux/rsyslog-mmjsonparse to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  20. Upgrade

    Upgrade rocky-linux/rsyslog-mmaudit-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  21. Upgrade

    Upgrade rocky-linux/rsyslog-mmsnmptrapd-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  22. Upgrade

    Upgrade rocky-linux/rsyslog-pgsql to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  23. Upgrade

    Upgrade rocky-linux/rsyslog-omamqp1-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  24. Upgrade

    Upgrade rocky-linux/rsyslog-gssapi to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  25. Upgrade

    Upgrade rocky-linux/rsyslog-mmfields-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  26. Upgrade

    Upgrade rocky-linux/rsyslog-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  27. Upgrade

    Upgrade rocky-linux/rsyslog-relp to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  28. Upgrade

    Upgrade rocky-linux/rsyslog-mmfields to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  29. Upgrade

    Upgrade rocky-linux/rsyslog-kafka-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  30. Upgrade

    Upgrade rocky-linux/rsyslog-snmp to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  31. Upgrade

    Upgrade rocky-linux/rsyslog-crypto-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  32. Upgrade

    Upgrade rocky-linux/rsyslog-udpspoof-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  33. Upgrade

    Upgrade rocky-linux/rsyslog-openssl to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  34. Upgrade

    Upgrade rocky-linux/rsyslog-gnutls-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  35. Upgrade

    Upgrade rocky-linux/rsyslog-elasticsearch-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  36. Upgrade

    Upgrade rocky-linux/rsyslog-relp-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  37. Upgrade

    Upgrade rocky-linux/rsyslog-debugsource to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  38. Upgrade

    Upgrade rocky-linux/rsyslog-gssapi-debuginfo to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  39. Upgrade

    Upgrade rocky-linux/rsyslog-udpspoof to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1
  40. Upgrade

    Upgrade rocky-linux/rsyslog-doc to a version that resolves this vulnerability.

    Fixed in 0:8.2604.0-5.el10_3.1

Event History

Nov 13, 2026
Advisory Published
via OSV·12:06 PM
Data Sourced
via OSV·12:06 PM
DescriptionSeverityAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

Can an attacker exploit this issue remotely without credentials or user interaction?

The CVSS vector indicates network-based exploitation with low attack complexity, no privileges required, and no user interaction required.

2

What is the expected security impact of successful exploitation?

The issue is described as a heap buffer overflow in the RainerScript replace() function that can cause a denial of service. The CVSS vector reports high availability impact and no confidentiality or integrity impact.

3

Which Rocky Linux rsyslog package variants are identified in this advisory?

The listed packages are rsyslog-kafka, rsyslog-mmaudit, rsyslog-openssl-debuginfo, rsyslog-mysql, rsyslog-mmnormalize-debuginfo, rsyslog-elasticsearch, rsyslog-mysql-debuginfo, and rsyslog-mmkubernetes.

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Contact

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