{
  "threat_severity" : "Moderate",
  "public_date" : "2026-04-07T13:07:08Z",
  "bugzilla" : {
    "description" : "Apache Kafka Clients: Apache Kafka Clients: Information disclosure and data corruption due to race condition in producer buffer management",
    "id" : "2455916",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2455916"
  },
  "cvss3" : {
    "cvss3_base_score" : "6.8",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-367",
  "details" : [ "A race condition in the Apache Kafka Java producer client’s buffer pool management can cause messages to be silently delivered to incorrect topics.\nWhen a produce batch expires due to delivery.timeout.ms while a network request containing that batch is still in flight, the batch’s ByteBuffer is prematurely deallocated and returned to the buffer pool. If a subsequent producer batch—potentially destined for a different topic—reuses this freed buffer before the original network request completes, the buffer contents may become corrupted. This can result in messages being delivered to unintended topics without any error being reported to the producer.\nData Confidentiality:\nMessages intended for one topic may be delivered to a different topic, potentially exposing sensitive data to consumers who have access to the destination topic but not the intended source topic.\nData Integrity:\nConsumers on the receiving topic may encounter unexpected or incompatible messages, leading to deserialization failures, processing errors, and corrupted downstream data.\nThis issue affects Apache Kafka versions ≤ 3.9.1, ≤ 4.0.1, and  ≤ 4.1.1.\nKafka users are advised to upgrade to 3.9.2, 4.0.2, 4.1.2, 4.2.0, or later to address this vulnerability.", "A flaw was found in the Apache Kafka Java producer client. A race condition in the client's buffer pool management can cause messages to be silently delivered to incorrect topics. This occurs when a message batch expires while its network request is still active, leading to premature buffer deallocation and potential reuse by other messages. Consequently, sensitive data may be exposed to unauthorized consumers, and data integrity can be compromised through deserialization failures and processing errors." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Build of Apache Camel 4.14 for Quarkus 3.27",
    "release_date" : "2026-05-05T00:00:00Z",
    "advisory" : "RHSA-2026:13631",
    "cpe" : "cpe:/a:redhat:apache_camel_quarkus:3.27",
    "package" : "kafka-clients"
  }, {
    "product_name" : "Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14",
    "release_date" : "2026-05-14T00:00:00Z",
    "advisory" : "RHSA-2026:17668",
    "cpe" : "cpe:/a:redhat:apache_camel_spring_boot:4.18",
    "package" : "kafka-clients"
  }, {
    "product_name" : "Red Hat build of Quarkus 3.27.3.SP1",
    "release_date" : "2026-05-05T00:00:00Z",
    "advisory" : "RHSA-2026:11721",
    "cpe" : "cpe:/a:redhat:quarkus:3.27::el8",
    "package" : "kafka-clients"
  } ],
  "package_state" : [ {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Affected",
    "package_name" : "openshift-serverless-1/kn-ekb-dispatcher-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "OpenShift Serverless",
    "fix_state" : "Affected",
    "package_name" : "openshift-serverless-1/kn-ekb-receiver-rhel9",
    "cpe" : "cpe:/a:redhat:serverless:1"
  }, {
    "product_name" : "Red Hat build of Apache Camel 4 for Quarkus 3",
    "fix_state" : "Affected",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:camel_quarkus:3"
  }, {
    "product_name" : "Red Hat build of Apicurio Registry 2",
    "fix_state" : "Will not fix",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:service_registry:2"
  }, {
    "product_name" : "Red Hat build of Apicurio Registry 3",
    "fix_state" : "Affected",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:apicurio_registry:3"
  }, {
    "product_name" : "Red Hat build of Debezium 2",
    "fix_state" : "Affected",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:debezium:2"
  }, {
    "product_name" : "Red Hat build of Debezium 3",
    "fix_state" : "Will not fix",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:debezium:3"
  }, {
    "product_name" : "Red Hat Data Grid 8",
    "fix_state" : "Not affected",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:jboss_data_grid:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "log4j:2/log4j",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "log4j",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Fuse 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:jboss_fuse:7"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_application_platform:7"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform 8",
    "fix_state" : "Not affected",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_application_platform:8"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform Expansion Pack",
    "fix_state" : "Affected",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:jbosseapxp"
  }, {
    "product_name" : "Red Hat Process Automation 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_bpms_platform:7"
  }, {
    "product_name" : "streams for Apache Kafka 2",
    "fix_state" : "Out of support scope",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:amq_streams:2"
  }, {
    "product_name" : "streams for Apache Kafka 3",
    "fix_state" : "Affected",
    "package_name" : "kafka-clients",
    "cpe" : "cpe:/a:redhat:amq_streams:3"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-35554\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-35554\nhttps://issues.apache.org/jira/browse/KAFKA-19012\nhttps://lists.apache.org/thread/f07x7j8ovyqhjd1to25jsnqbm6wj01d6" ],
  "name" : "CVE-2026-35554",
  "mitigation" : {
    "value" : "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.",
    "lang" : "en:us"
  },
  "csaw" : false
}