RHSA-2026:96085: Important: rsyslog security update
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
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/rsyslogto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-cryptoto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-debuginfoto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-docto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-elasticsearchto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-gnutlsto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-gssapito a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-kafkato a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-libdbito a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-mmauditto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-mmjsonparseto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-mmkubernetesto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-mmnormalizeto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-mmsnmptrapdto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-mysqlto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-pgsqlto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-relpto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-snmpto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4 - Upgrade
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redhat/rsyslog-udpspoofto a version that resolves this vulnerability.Fixed in 8.24.0-57.el7_9.4
Event History
Frequently Asked Questions
What capability must be in use for this issue to be relevant?
The flaw is in rsyslog's RainerScript replace() function. Systems are affected where rsyslog processes configurations or rules that invoke that function; the supplied data does not state whether it is used by default.
What is the known impact of successful exploitation?
The issue is a heap buffer overflow that can cause a denial of service in rsyslog. No other impact is stated in the provided advisory data.
Which Red Hat rsyslog package variants are covered by the update?
The advisory lists rsyslog, rsyslog-crypto, rsyslog-debuginfo, rsyslog-elasticsearch, rsyslog-gnutls, rsyslog-gssapi, rsyslog-kafka, and rsyslog-libdbi.