CVE-2026-57227
Description
A flaw was found in Suricata. The MQTT parser in Suricata permits repeated PUBREC or PUBREL messages to be appended to a transaction without a limit. A remote attacker can send crafted MQTT traffic to grow the transaction state indefinitely, consuming excessive CPU and memory resources. This can lead to a significant slowdown or a complete denial of service for the system.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
When allocating resources without limits, an attacker could prevent other systems, applications, or processes from accessing the same type of resource. It can be easy for an attacker to consume many resources by rapidly making many requests or causing larger resources to be used than is needed.
Frequently Asked Questions
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